scsi: lpfc: Fix MDS Diagnostic Enablement definition

The MDS diagnostic enablement bit for the adapter interface is incorrect in
the driver header.

Correct the bit position for the SET_FEATURE MDS bit.

Link: https://lore.kernel.org/r/20200501214310.91713-9-jsmart2021@gmail.comReviewed-by: NHannes Reinecke <hare@suse.de>
Signed-off-by: NDick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: NJames Smart <jsmart2021@gmail.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/lpfc/lpfc_hw4.h

@@ -3541,7 +3541,7 @@ struct lpfc_mbx_set_feature {
 #define lpfc_mbx_set_feature_UER_SHIFT  0
 #define lpfc_mbx_set_feature_UER_MASK   0x00000001
 #define lpfc_mbx_set_feature_UER_WORD   word6
-#define lpfc_mbx_set_feature_mds_SHIFT  0
+#define lpfc_mbx_set_feature_mds_SHIFT  2
 #define lpfc_mbx_set_feature_mds_MASK   0x00000001
 #define lpfc_mbx_set_feature_mds_WORD   word6
 #define lpfc_mbx_set_feature_mds_deep_loopbk_SHIFT  1