ARM: dts: Add minimal support for dm8168-evm

This allows booting the device with basic functionality.

Note that at least on my revision c board the DDR3 does
not seem to work properly and only some of the memory
can be reliably used.

Also, the mainline u-boot does not seem to properly
initialize the ethernet, so I've been using the old TI
u-boot at:

http://arago-project.org/git/projects/?p=u-boot-omap3.git;a=summary

Cc: Brian Hutchinson <b.hutchman@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/include/dt-bindings/pinctrl/omap.h b/include/dt-bindings/pinctrl/omap.h
index 1c75b8c..1394925 100644
--- a/include/dt-bindings/pinctrl/omap.h
+++ b/include/dt-bindings/pinctrl/omap.h
@@ -61,6 +61,7 @@
 #define OMAP3430_CORE2_IOPAD(pa, val)	OMAP_IOPAD_OFFSET((pa), 0x25d8) (val)
 #define OMAP3630_CORE2_IOPAD(pa, val)	OMAP_IOPAD_OFFSET((pa), 0x25a0) (val)
 #define OMAP3_WKUP_IOPAD(pa, val)	OMAP_IOPAD_OFFSET((pa), 0x2a00) (val)
+#define DM816X_IOPAD(pa, val)		OMAP_IOPAD_OFFSET((pa), 0x0800) (val)
 #define AM33XX_IOPAD(pa, val)		OMAP_IOPAD_OFFSET((pa), 0x0800) (val)
 #define AM4372_IOPAD(pa, val)		OMAP_IOPAD_OFFSET((pa), 0x0800) (val)
 #define DRA7XX_CORE_IOPAD(pa, val)	OMAP_IOPAD_OFFSET((pa), 0x3400) (val)