Staging: rtl8712: os_intfs.c : Coding style warning fix for block comment

This is patch to the os_intfs.c file that fixes up following warning
reported by checkpatch.pl :

-Block comments use a trailing */ on a separate line
Signed-off-by: Punit Vara <punitvara@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8712/os_intfs.c

@@ -366,7 +366,8 @@ static void enable_video_mode(struct _adapter *padapter, int cbw40_value)
 
 	if (cbw40_value) {
 		/* if the driver supports the 40M bandwidth,
-		 * we can enable the bit 9.*/
+		 * we can enable the bit 9.
+		 */
 		intcmd |= 0x200;
 	}
 	r8712_fw_cmd(padapter, intcmd);