[SCSI] qla2xxx: Use completion routines.

Instead of abusing the semaphore interfaces for mailbox command
completions.

Additional cleanups and
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index d0b78af..144f6d0 100644
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -2413,9 +2413,9 @@
 #define MBX_INTR_WAIT	2
 #define MBX_UPDATE_FLASH_ACTIVE	3
 
-	struct semaphore mbx_cmd_sem;	/* Serialialize mbx access */
 	struct semaphore vport_sem;	/* Virtual port synchronization */
-	struct semaphore mbx_intr_sem;  /* Used for completion notification */
+	struct completion mbx_cmd_comp;	/* Serialize mbx access */
+	struct completion mbx_intr_comp;  /* Used for completion notification */
 
 	uint32_t	mbx_flags;
 #define  MBX_IN_PROGRESS	BIT_0