ARM: dts: Add devicetree for Gumstix Pepper board

This adds the Gumstix Pepper[1] single-board computer based on the
TI AM335x processor. Schematics are available [2].

[1] https://store.gumstix.com/index.php/products/344/
[2] https://pubs.gumstix.com/boards/PEPPER/Signed-off-by: Ash Charles <ashcharles@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/Makefile

@@ -291,7 +291,8 @@ dtb-$(CONFIG_SOC_AM33XX) += am335x-base0033.dtb \
 	am335x-boneblack.dtb \
 	am335x-evm.dtb \
 	am335x-evmsk.dtb \
-	am335x-nano.dtb
+	am335x-nano.dtb \
+	am335x-pepper.dtb
 dtb-$(CONFIG_ARCH_OMAP4) += omap4-duovero-parlor.dtb \
 	omap4-panda.dtb \
 	omap4-panda-a4.dtb \