staging: rtl8723au: fix sparse warning

change cast to __le16 to fix the following warning:
drivers/staging/rtl8723au/hal/rtl8723a_hal_init.c:1488:20: warning: cast to restricted __le16
Signed-off-by: Juston Li <juston.h.li@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8723au/hal/rtl8723a_hal_init.c

@@ -1485,7 +1485,7 @@ void Hal_EfuseParseIDCode(struct rtw_adapter *padapter, u8 *hwinfo)
 	u16 EEPROMId;
 
 	/*  Checl 0x8129 again for making sure autoload status!! */
-	EEPROMId = le16_to_cpu(*((u16 *) hwinfo));
+	EEPROMId = le16_to_cpu(*((__le16 *) hwinfo));
 	if (EEPROMId != RTL_EEPROM_ID) {
 		DBG_8723A("EEPROM ID(%#x) is invalid!!\n", EEPROMId);
 		pEEPROM->bautoload_fail_flag = true;