am335x, guardian: Add support for the bosch guardian board

Add support for the Bosch Guardian board.

CPU  : AM335X-GP rev 2.1
Model: Bosch AM335x Guardian
I2C:   ready
DRAM:  256 MiB
NAND:  512 MiB
MMC:   OMAP SD/MMC: 0

Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Signed-off-by: Martyn Welch <martyn.welch@collabora.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Felix Brack <fb@ltec.ch>
diff --git a/arch/arm/mach-omap2/am33xx/Kconfig b/arch/arm/mach-omap2/am33xx/Kconfig
index 85ea894..500df1a 100644
--- a/arch/arm/mach-omap2/am33xx/Kconfig
+++ b/arch/arm/mach-omap2/am33xx/Kconfig
@@ -87,6 +87,13 @@
 	imply CMD_DM
 	imply CMD_SPL
 
+config TARGET_AM335X_GUARDIAN
+	bool "Support am335x based guardian board from bosch"
+	select DM
+	select DM_SERIAL
+	select DM_GPIO
+	select DM_USB
+
 config TARGET_AM335X_SL50
 	bool "Support am335x_sl50"
 	select BOARD_LATE_INIT