In order to conduct FFU or RPMB operations, UFS needs to clear UNIT
ATTENTION condition. Clear it explicitly so that we get no failures during
initialization.

Link: https://lore.kernel.org/r/20201117165839.1643377-4-jaegeuk@kernel.orgSigned-off-by: NJaegeuk Kim <jaegeuk@google.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>