MLK-23574-27 imx8mm_evk: Update board codes and add DDR4 support

Update the board codes to use latest DDR script and support flexspi boot,
USB host/gadget, etc.
Also add DDR4 EVK board support for RAW NAND boot.

Signed-off-by: Ye Li <ye.li@nxp.com>
(cherry picked from commit 07c35f4)

Author: Ye Li

arch/arm/mach-imx/imx8m/Kconfig

@@ -50,6 +50,12 @@ config TARGET_IMX8MM_VENICE
 	select SUPPORT_SPL
 	select IMX8M_LPDDR4
 
+config TARGET_IMX8MM_DDR4_EVK
+	bool "imx8mm DDR4 EVK board"
+	select IMX8MM
+	select SUPPORT_SPL
+	select IMX8M_DDR4
+
 config TARGET_IMX8MN_DDR4_EVK
 	bool "imx8mn DDR4 EVK board"
 	select IMX8MN

arch/arm/mach-imx/imx8m/imximage-8mm-ddr4.cfg

@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright 2019 NXP
+ */
+
+#define __ASSEMBLY__
+
+FIT
+BOOT_FROM	sd
+LOADER		spl/u-boot-spl-ddr.bin	0x7E1000
+SECOND_LOADER	u-boot.itb		0x40200000 0x60000
+
+DDR_FW ddr4_imem_1d.bin
+DDR_FW ddr4_dmem_1d.bin
+DDR_FW ddr4_imem_2d.bin
+DDR_FW ddr4_dmem_2d.bin

board/freescale/imx8mm_evk/Kconfig

@@ -1,4 +1,4 @@
-if TARGET_IMX8MM_EVK
+if TARGET_IMX8MM_EVK || TARGET_IMX8MM_DDR4_EVK
 
 config SYS_BOARD
 	default "imx8mm_evk"
@@ -9,4 +9,6 @@ config SYS_VENDOR
 config SYS_CONFIG_NAME
 	default "imx8mm_evk"
 
+source "board/freescale/common/Kconfig"
+
 endif

board/freescale/imx8mm_evk/Makefile

@@ -9,4 +9,5 @@ obj-y += imx8mm_evk.o
 ifdef CONFIG_SPL_BUILD
 obj-y += spl.o
 obj-$(CONFIG_IMX8M_LPDDR4) += lpddr4_timing.o
+obj-$(CONFIG_IMX8M_DDR4) += ddr4_timing.o
 endif