staging: rtl8192u: use __packed instead of __attribute__((packed))

This patch fixes the following checkpatch warning:
WARNING: __packed is preferred over __attribute__((packed))
Signed-off-by: Xenia Ragiadakou <burzalodowa@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8192u/r819xU_HTType.h

@@ -145,7 +145,7 @@ typedef	struct _HT_CAPABILITY_ELE{
 	//Antenna Selection Capabilities
 	u8	ASCap;
 
-}__attribute__((packed)) HT_CAPABILITY_ELE, *PHT_CAPABILITY_ELE;
+}__packed HT_CAPABILITY_ELE, *PHT_CAPABILITY_ELE;
 
 //------------------------------------------------------------
 // The HT Information element is present in beacons
@@ -177,7 +177,7 @@ typedef struct _HT_INFORMATION_ELE{
 	u8	Rsvd4:4;
 
 	u8	BasicMSC[16];
-}__attribute__((packed)) HT_INFORMATION_ELE, *PHT_INFORMATION_ELE;
+}__packed HT_INFORMATION_ELE, *PHT_INFORMATION_ELE;
 
 //
 // MIMO Power Save control field.

drivers/staging/rtl8192u/r819xU_cmdpkt.h

@@ -124,7 +124,7 @@ typedef struct tag_tx_stats_feedback {
 	u16	reserve3_23;
 	u8	reserve3_1;
 	u8	rate;
-} __attribute__((packed)) cmpk_tx_status_t;
+} __packed cmpk_tx_status_t;
 
 /* 6. Debug feedback message. */
 /* Define RX debug message  */
@@ -161,7 +161,7 @@ typedef struct tag_tx_rate_history {
 	 */
 	u16	ht_mcs[4][16];
 
-} __attribute__((packed)) cmpk_tx_rahis_t;
+} __packed cmpk_tx_rahis_t;
 
 typedef enum tag_command_packet_directories {
 	RX_TX_FEEDBACK			= 0,

drivers/staging/rtl8192u/r819xU_phy.h

@@ -23,7 +23,7 @@ typedef struct _SwChnlCmd {
 	u32		Para1;
 	u32		Para2;
 	u32		msDelay;
-} __attribute__ ((packed)) SwChnlCmd;
+} __packed SwChnlCmd;
 
 extern u32 rtl819XMACPHY_Array_PG[];
 extern u32 rtl819XPHY_REG_1T2RArray[];