scsi: qla2xxx: don't use zero for FC4_PRIORITY_NVME

Avoid an uninitialized value (0) for ha->fc4_type_priority being falsely
interpreted as NVMe priority. Not strictly needed any more after the
previous patch, but makes the fc4_type_priority handling more explicit.

Link: https://lore.kernel.org/r/20191107224839.32417-3-martin.wilck@suse.com
Tested-by: David Bond <dbond@suse.com>
Acked-by: Himanshu Madhani <hmadhani@marvell.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin Wilck <mwilck@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/qla2xxx/qla_def.h

@@ -2480,8 +2480,10 @@ typedef struct fc_port {
 	u16 n2n_chip_reset;
 } fc_port_t;
 
-#define FC4_PRIORITY_NVME	0
-#define FC4_PRIORITY_FCP	1
+enum {
+	FC4_PRIORITY_NVME = 1,
+	FC4_PRIORITY_FCP  = 2,
+};
 
 #define QLA_FCPORT_SCAN		1
 #define QLA_FCPORT_FOUND	2

drivers/scsi/qla2xxx/qla_inline.h

@@ -317,5 +317,5 @@ qla2xxx_get_fc4_priority(struct scsi_qla_host *vha)
 	    ((uint8_t *)vha->hw->nvram)[NVRAM_DUAL_FCP_NVME_FLAG_OFFSET];
 
 
-	return ((data >> 6) & BIT_0);
+	return (data >> 6) & BIT_0 ? FC4_PRIORITY_FCP : FC4_PRIORITY_NVME;
 }