ARM: am335x: Add phyCORE AM335x R2 support

Support for Phytech phyCORE AM335x R2 SOM (PCL060) on the Phytec
phyBOARD-Wega AM335x.

CPU  : AM335X-GP rev 2.1
Model: Phytec AM335x phyBOARD-WEGA
DRAM:  256 MiB
NAND:  256 MiB
MMC:   OMAP SD/MMC: 0
eth0: ethernet@4a100000

Working:
 - Eth0
 - i2C
 - MMC/SD
 - NAND
 - UART
 - USB (host)

Device trees were taken from Linux mainline:
commit 37624b58542f ("Linux 5.1-rc7")

Signed-off-by: Niel Fourie <lusus@denx.de>
Signed-off-by: Parthiban Nallathambi <pn@denx.de>
Reviewed-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Tom Rini <trini@konsulko.com>
Tested-by: Marek Vasut <marex@denx.de>
diff --git a/arch/arm/mach-omap2/Kconfig b/arch/arm/mach-omap2/Kconfig
index d29f1ca..3fa9dc8 100644
--- a/arch/arm/mach-omap2/Kconfig
+++ b/arch/arm/mach-omap2/Kconfig
@@ -186,6 +186,7 @@
 source "board/ti/am335x/Kconfig"
 source "board/compulab/cm_t335/Kconfig"
 source "board/compulab/cm_t43/Kconfig"
+source "board/phytec/phycore_am335x_r2/Kconfig"
 
 config SPL_LDSCRIPT
         default "arch/arm/mach-omap2/u-boot-spl.lds"
diff --git a/arch/arm/mach-omap2/am33xx/Kconfig b/arch/arm/mach-omap2/am33xx/Kconfig
index 500df1a..9da2a16 100644
--- a/arch/arm/mach-omap2/am33xx/Kconfig
+++ b/arch/arm/mach-omap2/am33xx/Kconfig
@@ -177,6 +177,13 @@
 	select DM_SERIAL
 	imply CMD_DM
 
+config TARGET_PHYCORE_AM335X_R2
+	bool "Support phyCORE AM335X R2"
+	select DM
+	select DM_GPIO
+	select DM_SERIAL
+	imply CMD_DM
+
 config TARGET_PXM2
 	bool "Support pxm2"
 	select BOARD_LATE_INIT