Revert "Recreate asm/mach/mmc.h include file"

This reverts commit 5b42ae3e.

This recereated arch/arm/include/asm/mach/mmc.h include file has
no active user in android-4.x kernels. Also all the necessary bits
are already moved to include/linux/amba/mmci.h.

6ef297f8 (ARM: 5720/1: Move MMCI header to amba include dir)

Change-Id: Ibf258b355d17f54f49b777a8f6e0089e9b59a3a5
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>