If (x_status & XE_PARITY_ERR) is true we set cam_status = DID_PARITY,
othervise cam_status always ends up being DID_ERROR. Delete superfluous
else-if statements.

Link: https://lore.kernel.org/r/20200902061646.576966-1-yebin10@huawei.comSigned-off-by: Ye Bin <yebin10@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>