ext4_utils: Yet another MMC discard pain in the ass

 * Secure discard on this device is painfully slow. Use regular
   discard until the issue is sorted out.

Change-Id: Ib8ccb12829385aa267253f772e243bef8850f455
Merge branch 'cm' into HEAD

Signed-off-by: DHOMD <DHO@dho.im>

Conflicts:
	ext4_utils/wipe.c

Change-Id: Ic5c3fd72e22bf8c62f3f7bd342f4df1e1f2010bb