ARM: OMAP2: Add minimal dm814x hwmod support

Let's add minimal set of dm814x hwmods to have a bootable system.

Cc: Matthijs van Duin <matthijsvanduin@gmail.com>
Cc: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

diff --cc arch/arm/mach-omap2/io.c
Simple merge

diff --cc arch/arm/mach-omap2/omap_hwmod.c
Simple merge

diff --cc arch/arm/mach-omap2/omap_hwmod.h
Simple merge

diff --cc arch/arm/mach-omap2/omap_hwmod_81xx_data.c
Simple merge