mtip32xx: Fix padding issue

Hi Jens,

Another tiny patch.

Removed __packed before the struct smart_attr and added __packed at end of
the structure to fix padding issue.
Signed-off-by: NSelvan Mani  <smani@micron.com>
Signed-off-by: NAsai Thambi S P <asamymuthupa@micron.com>
Signed-off-by: NJens Axboe <axboe@kernel.dk>

drivers/block/mtip32xx/mtip32xx.h

@@ -155,14 +155,14 @@ enum {
 	MTIP_DDF_REBUILD_FAILED_BIT = 8,
 };
 
-__packed struct smart_attr{
+struct smart_attr {
 	u8 attr_id;
 	u16 flags;
 	u8 cur;
 	u8 worst;
 	u32 data;
 	u8 res[3];
-};
+} __packed;
 
 /* Register Frame Information Structure (FIS), host to device. */
 struct host_to_dev_fis {