arm, am335x: add support for the bosch shc board

add support for the am335x based shc board.

UART: 0-2 and 4
DRAM: 512 MiB
MMC:  OMAP SD/MMC: 0 @ 26 MHz
      OMAP SD/MMC: 1 @ 26 MHz
I2C:  at24 eeprom, pcf8563
USB:  USB1 (host)
Signed-off-by: Heiko Schocher <hs@denx.de>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/Makefile

@@ -466,6 +466,7 @@ dtb-$(CONFIG_SOC_AM33XX) += \
 	am335x-lxm.dtb \
 	am335x-nano.dtb \
 	am335x-pepper.dtb \
+	am335x-shc.dtb \
 	am335x-sl50.dtb \
 	am335x-wega-rdk.dtb
 dtb-$(CONFIG_ARCH_OMAP4) += \