scsi: ufs: ignore hibern8 enter failure after UFS card is removed

If the removable UFS card is removed during hibern8 enter, error is
expected. Ignore the error for this case.

Change-Id: I55f507c0b66a13ff5b4295a9ee00231dc5b9a96f
Signed-off-by: Can Guo <cang@codeaurora.org>