[SCSI] mptfusion: Event data alignment with 4 byte.

event_data needs to be 4 byte aligned to makes sure there is no unaligned
memory access take place.
Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

drivers/message/fusion/mptsas.h

@@ -110,7 +110,7 @@ struct fw_event_work {
 	MPT_ADAPTER	*ioc;
 	u32			event;
 	u8			retries;
-	u8			event_data[1];
+	u8			__attribute__((aligned(4))) event_data[1];
 };
 
 struct mptsas_discovery_event {