scsi: ufs: Use 'else' in ufshcd_set_dev_pwr_mode()

Convert if (ret) { ... } if (!ret) { ... } into
if (ret) { ... } else { ... }.

Reviewed-by: Bean Huo <beanhuo@micron.com>
Reviewed-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20221018202958.1902564-6-bvanassche@acm.org


Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>