Revert "ARM: Add 'card_present' state to mmc_platfrom_data"

This reverts commit 54163227.

mmc_platform_data (or arch/arm/include/asm/mach/mmc.h in general)
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: Iff384eb527327bf88543408e0257241c1fd99a43
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>