[Silabs] Adds refactored spi multiplexing with feature toggle for NCP…

… combinations (#29414)

* Adds DISPLAY_ENABLED macro for SPI multiplexed functions

* Adds CONFIG_USE_EXTERNAL_FLASH macro for SPI multiplex functions

* Added proper MACROs for the features that require multiplexing

* temp commit with test file

* Adds fix for crash on rs91x

* Adds updated build commands

* adds DEBUG logs

* Adds bugfixes to MACROs

* Adds additional logs

* Adds fix to UART multiplexing

* Remove comments

* Adds ported changes

* Adds use of SL_CATALOG_UARTDRV_USART_PRESENT, SL_CATALOG_UARTDRV_EUSART_PRESENT

* Removes code since WF200 requires SL_CATALOG_UARTDRV_USART_PRESENT only

* Restyler changes

* Adds additional changes to wrap multiplexing with MACROs

* Remove log commit

* Adds dummy buffer length check

* Restyler changes

* Removes use of unnecessary MACRO

* adds thread check

* Adds comment

* updated build script

* Adds refactored includes and define macros

* Adds spell fix

* Adds feature macro for header include

* Remove temp code

* Adds refactored deassert

* Comment reformatting

---------

Co-authored-by: Rohan S <3526930+brosahay@users.noreply.github.com>

examples/platform/silabs/display/demo-ui.c

@@ -23,11 +23,11 @@
 #include "dmd/dmd.h"
 #include "em_types.h"
 #include "glib.h"
+#if SL_WIFI && !SIWX_917
+#include "spi_multiplex.h"
+#endif // SL_WIFI && !SIWX_917
 #include <stdio.h>
 #include <string.h>
-#if (defined(EFR32MG24) && defined(SL_WIFI))
-#include "spi_multiplex.h"
-#endif
 
 // Main Logo and App image
 #define SILICONLABS_X_POSITION ((glibContext.pDisplayGeometry->xSize - SILICONLABS_BITMAP_WIDTH) / 2)
@@ -102,13 +102,13 @@ void demoUIInit(GLIB_Context_t * context)
 
 sl_status_t updateDisplay(void)
 {
-#if (defined(EFR32MG24) && defined(SL_WIFI))
+#if SL_LCDCTRL_MUX
     sl_wfx_host_pre_lcd_spi_transfer();
-#endif
+#endif // SL_LCDCTRL_MUX
     sl_status_t status = DMD_updateDisplay();
-#if (defined(EFR32MG24) && defined(SL_WIFI))
+#if SL_LCDCTRL_MUX
     sl_wfx_host_post_lcd_spi_transfer();
-#endif
+#endif // SL_LCDCTRL_MUX
     if (status != DMD_OK)
         return SL_STATUS_FAIL;
     return SL_STATUS_OK;

examples/platform/silabs/display/lcd.cpp

@@ -35,9 +35,6 @@
 
 #include "sl_board_control.h"
 
-#if (defined(EFR32MG24) && defined(SL_WIFI))
-#include "spi_multiplex.h"
-#endif
 #define LCD_SIZE 128
 #define QR_CODE_VERSION 4
 #define QR_CODE_MODULE_SIZE 3