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Adding a new ioctl to support sanitize operation in eMMC
cards version 4.5.
The sanitize ioctl support helps performing this operation
via user application.

Change-Id: I79aa4163e7753a75bed5a26a9a92de902b4b9c21
Signed-off-by: Yaniv Gardi <ygardi@codeaurora.org>
Signed-off-by: Maya Erez <merez@codeaurora.org>
(cherry picked from commit 73937f5f)

Conflicts:

	block/blk-core.c
	block/elevator.c
	include/linux/blk_types.h
	include/linux/blkdev.h
	include/linux/fs.h