Staging: rtl8712: remove void function return; statement

This patch fixes checkpatch.pl warning in files of rtl8712
WARNING : void function return statement are not generally useful
Signed-off-by: Tapasweni Pathak <tapaswenipathak@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8712/rtl871x_security.c

@@ -252,7 +252,6 @@ void r8712_wep_decrypt(struct _adapter  *padapter, u8 *precvframe)
 		/* calculate icv and compare the icv */
 		*((u32 *)crc) = cpu_to_le32(getcrc32(payload, length - 4));
 	}
-	return;
 }
 
 /* 3 =====TKIP related===== */

drivers/staging/rtl8712/usb_intf.c

@@ -635,7 +635,6 @@ static void r871xu_dev_remove(struct usb_interface *pusb_intf)
 	 * Reset usb port for sitesurvey fail issue. */
 	if (udev->state != USB_STATE_NOTATTACHED)
 		usb_reset_device(udev);
-	return;
 }
 
 static int __init r8712u_drv_entry(void)