Revert "ARM: EXYNOS: Manta: Enable emmc 4.5 packed write support"

This reverts commit 8a1e1a4b5e49d1e41c39a16da42ac4f129595c61.
This is for testing to see if turning off packed write support
fixes the eMMC crashes we've been seeing.

Conflicts:

	arch/arm/mach-exynos/board-manta.c

Change-Id: I390f6cbd78fde9f7e052995d66a4392c019791c5
Signed-off-by: Ken Sumrall <ksumrall@android.com>