arm: am437x: Introduce new board cm-t43

Add initial support for CM-T43, an AM437x based SoM.
This support includes: serial, MMC/eMMC, NAND, USB, ETH, I2C, GPIO, DRAM
detection.

Cc: Tom Rini <trini@konsulko.com>
Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Cc: Igor Grinberg <grinberg@compulab.co.il>
Signed-off-by: Nikita Kiryanov <nikita@compulab.co.il>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index e9a30b6..bd18e0a 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -643,6 +643,11 @@
 	select DM_SPI_FLASH
 	select DM_SPI
 
+config TARGET_CM_T43
+	bool "Support cm_t43"
+	select CPU_V7
+	select SUPPORT_SPL
+
 config ARCH_SUNXI
 	bool "Support sunxi (Allwinner) SoCs"
 	select CMD_USB
@@ -902,6 +907,7 @@
 source "board/broadcom/bcmnsp/Kconfig"
 source "board/cirrus/edb93xx/Kconfig"
 source "board/compulab/cm_t335/Kconfig"
+source "board/compulab/cm_t43/Kconfig"
 source "board/compulab/cm_fx6/Kconfig"
 source "board/congatec/cgtqmx6eval/Kconfig"
 source "board/creative/xfi3/Kconfig"