scsi: ufs: handle errors from PHY_ADAPTER_ERROR register

The PHY_ADAPTER_ERROR status register indicates PHY lane errors
reported by the M-PHY layer. In some occasions the controller
can recover from such errors. When the error is not recoverable,
a stuck DB error will occur. Since the stuck DB error is spotted
separately, no action other than clearing the register is necessary.

Change-Id: I4b9e8ab15018fe74da34264eac71f8110e94928a
Signed-off-by: Dolev Raviv <draviv@codeaurora.org>