[EFR32] Support external flash on EFRMG24 boards

[selissia]

Problem

EFRMG24 boards need to support external flash for the OTA Software update opration

Change overview

Point third_party/efr32_sdk/ repo to the latest commit that introduces external flash support on EFRMG24 boards (change LCD to use USART, change VCOM to use EUSART, change the external flash to use USART). Update Matter EFR32 platform files to sync with this change.

Testing

The following functionality was tested on BRD4161A (an MG12 board) and BRD4186A (an MG24 board)

• OTA software update with external flash
• LCD operation
• OpenTread CLI operation (verifies VCOM functionality)

[github-actions]

PR #18095: Size comparison from d228b75 to 318ebb3

Full report (23 builds for cc13x2_26x2, cyw30739, efr32, esp32, k32w, mbed, nrfconnect, p6, telink)

platform	target	config	section	d228b75	318ebb3	change	% change
cc13x2_26x2	all-clusters-app	LP_CC2652R7	(read only)	690331	690331	0	0.0
			(read/write)	162012	162012	0	0.0
			.bss	75324	75324	0	0.0
			.data	3412	3412	0	0.0
			.rodata	102899	102899	0	0.0
			.text	586948	586948	0	0.0
	lock-ftd	LP_CC2652R7	(read only)	677911	677911	0	0.0
			(read/write)	165536	165536	0	0.0
			.bss	73484	73484	0	0.0
			.data	3236	3236	0	0.0
			.rodata	94695	94695	0	0.0
			.text	582736	582736	0	0.0
	lock-mtd	LP_CC2652R7	(read only)	626663	626663	0	0.0
			(read/write)	146300	146300	0	0.0
			.bss	69204	69204	0	0.0
			.data	3236	3236	0	0.0
			.rodata	94583	94583	0	0.0
			.text	531592	531592	0	0.0
	pump-app	LP_CC2652R7	(read only)	662427	662427	0	0.0
			(read/write)	182316	182316	0	0.0
			.bss	73756	73756	0	0.0
			.data	3268	3268	0	0.0
			.rodata	80891	80891	0	0.0
			.text	581052	581052	0	0.0
	pump-controller-app	LP_CC2652R7	(read only)	655351	655351	0	0.0
			(read/write)	189192	189192	0	0.0
			.bss	73812	73812	0	0.0
			.data	3232	3232	0	0.0
			.rodata	83847	83847	0	0.0
			.text	571020	571020	0	0.0
cyw30739	light	cyw930739m2evb_01	(read/write)	627026	627026	0	0.0
			.app_xip_area	529616	529616	0	0.0
			.bss	80052	80052	0	0.0
			.data	708	708	0	0.0
			.rodata	0	0	0	0.0
			.text	0	0	0	0.0
	lock	cyw930739m2evb_01	(read/write)	625930	625930	0	0.0
			.app_xip_area	529984	529984	0	0.0
			.bss	78620	78620	0	0.0
			.data	672	672	0	0.0
			.rodata	0	0	0	0.0
			.text	0	0	0	0.0
	ota-requestor-no-progress-logging	cyw930739m2evb_01	(read/write)	574722	574722	0	0.0
			.app_xip_area	469060	469060	0	0.0
			.bss	88040	88040	0	0.0
			.data	584	584	0	0.0
			.rodata	0	0	0	0.0
			.text	112	112	0	0.0
efr32	lighting-app	BRD4161A	(read only)	909744	909744	0	0.0
			(read/write)	134520	134520	0	0.0
			.bss	132456	132456	0	0.0
			.data	2064	2064	0	0.0
			.text	909736	909736	0	0.0
		BRD4161A+rpc	(read only)	944088	944088	0	0.0
			(read/write)	151208	151208	0	0.0
			.bss	148936	148936	0	0.0
			.data	2268	2268	0	0.0
			.text	944080	944080	0	0.0
		BRD4161A+rs911x	(read only)	747932	747932	0	0.0
			(read/write)	128700	128700	0	0.0
			.bss	126708	126708	0	0.0
			.data	1992	1992	0	0.0
			.text	747924	747924	0	0.0
	lock-app	BRD4161A+wf200	(read only)	917636	917636	0	0.0
			(read/write)	127480	127480	0	0.0
			.bss	125532	125532	0	0.0
			.data	1948	1948	0	0.0
			.text	917628	917628	0	0.0
	window-app	BRD4161A	(read only)	847000	847000	0	0.0
			(read/write)	132608	132608	0	0.0
			.bss	130632	130632	0	0.0
			.data	1976	1976	0	0.0
			.text	846992	846992	0	0.0
esp32	all-clusters-app	c3devkit	(read only)	1000528	1000528	0	0.0
			(read/write)	1475258	1475258	0	0.0
			.dram0.bss	68464	68464	0	0.0
			.dram0.data	14444	14444	0	0.0
			.flash.rodata	207904	207904	0	0.0
			.flash.text	1000528	1000528	0	0.0
			.iram0.text	62020	62020	0	0.0
		m5stack	(read only)	1055547	1055547	0	0.0
			(read/write)	477680	477680	0	0.0
			.dram0.bss	73976	73976	0	0.0
			.dram0.data	34184	34184	0	0.0
			.flash.rodata	237684	237684	0	0.0
			.flash.text	1050163	1050163	0	0.0
			.iram0.text	123107	123107	0	0.0
k32w	light	k32w061+release	(read/write)	684560	684560	0	0.0
			.bss	81248	81248	0	0.0
			.data	2020	2020	0	0.0
			.text	599588	599588	0	0.0
	lock	k32w061+release	(read/write)	729900	729900	0	0.0
			.bss	81680	81680	0	0.0
			.data	1980	1980	0	0.0
			.text	644536	644536	0	0.0
mbed	lock-app	CY8CPROTO_062_4343W+release	(read only)	6224	6224	0	0.0
			(read/write)	2419124	2419124	0	0.0
			.bss	205820	205820	0	0.0
			.data	5872	5872	0	0.0
			.text	1381724	1381724	0	0.0
nrfconnect	all-clusters-app	nrf52840dk_nrf52840	(read/write)	1179187	1179187	0	0.0
			bss	139676	139676	0	0.0
			rodata	151460	151460	0	0.0
			text	809328	809328	0	0.0
p6	all-clusters-app	default	(read/write)	2530480	2530480	0	0.0
			.bss	139328	139328	0	0.0
			.data	2808	2808	0	0.0
			.text	1488744	1488744	0	0.0
	light-app	default	(read/write)	2420560	2420560	0	0.0
			.bss	132648	132648	0	0.0
			.data	2608	2608	0	0.0
			.text	1378824	1378824	0	0.0
	lock-app	default	(read/write)	2430064	2430064	0	0.0
			.bss	132472	132472	0	0.0
			.data	2568	2568	0	0.0
			.text	1388328	1388328	0	0.0
telink	lighting-app	tlsr9518adk80d	(read/write)	805408	805408	0	0.0
			bss	72172	72172	0	0.0
			noinit	40416	40416	0	0.0
			text	571882	571882	0	0.0