scsi: ufs: suppress hibern8 exit failure for UFS card

If UFS card is removed before or during hibern8 exit, hibern8 exit shall
fail and it is expected. For this situation, we suppress the error dump and
do not crash the kernel.

Change-Id: If14b4fcfc061d7c9b5881393d71c116e87cc7aa4
Signed-off-by: Can Guo <cang@codeaurora.org>