rtl8xxxu: Fix trailing semicolon

The trailing semicolon is an empty statement that does no operation.
Removing it since it doesn't do anything.
Signed-off-by: Luis de Bethencourt <luisbg@kernel.org>
Acked-by: Jes Sorensen <Jes.Sorensen@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h

@@ -1172,7 +1172,7 @@ struct rtl8723bu_c2h {
 
 			u8 basic_rate:1;
 			u8 bt_has_reset:1;
-			u8 dummy4_1:1;;
+			u8 dummy4_1:1;
 			u8 ignore_wlan:1;
 			u8 auto_report:1;
 			u8 dummy4_2:3;