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/Kconfig b/arch/arm/Kconfig
index 4a23e32..2567d78 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1563,6 +1563,7 @@
 source "arch/arm/mach-imx/Kconfig"
 
 source "board/bosch/shc/Kconfig"
+source "board/bosch/guardian/Kconfig"
 source "board/CarMediaLab/flea3/Kconfig"
 source "board/Marvell/aspenite/Kconfig"
 source "board/Marvell/gplugd/Kconfig"