scsi: ufs: ufs-qcom: Remove unneeded variable 'err'

'err' is never set in this functon. Remove the declaration and just return
0.

Link: https://lore.kernel.org/r/20210907044111.29632-1-cw9316.lee@samsung.comSigned-off-by: NChanWoo Lee <cw9316.lee@samsung.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/ufs/ufs-qcom.c

@@ -888,7 +888,6 @@ static int ufs_qcom_setup_clocks(struct ufs_hba *hba, bool on,
 				 enum ufs_notify_change_status status)
 {
 	struct ufs_qcom_host *host = ufshcd_get_variant(hba);
-	int err = 0;
 
 	/*
 	 * In case ufs_qcom_init() is not yet done, simply ignore.
@@ -916,7 +915,7 @@ static int ufs_qcom_setup_clocks(struct ufs_hba *hba, bool on,
 		break;
 	}
 
-	return err;
+	return 0;
 }
 
 static int