arm: mach-omap2: Factor out common FDT fixup suport

Some of the fixups currently done for OMAP5 class boards are common to
other OMAP family devices, move these to fdt-common.c.

Signed-off-by: Andrew F. Davis <afd@ti.com>
diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile
index d43085c..d86643d 100644
--- a/arch/arm/mach-omap2/Makefile
+++ b/arch/arm/mach-omap2/Makefile
@@ -45,4 +45,6 @@
 
 obj-y	+= mem-common.o
 
+obj-y	+= fdt-common.o
+
 obj-$(CONFIG_TI_SECURE_DEVICE) += sec-common.o