staging: gdm724x: Fix missing blank line warning.

Fixes "Missing a blank line after declarations" checkpatch.pl warning in
gdm_mux.c
Signed-off-by: Gulsah Kose <gulsah.1004@gmail.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/gdm724x/gdm_mux.c

@@ -517,6 +517,7 @@ static int gdm_mux_probe(struct usb_interface *intf,
 	int ret;
 	int i;
 	struct usb_device *usbdev = interface_to_usbdev(intf);
+
 	bInterfaceNumber = intf->cur_altsetting->desc.bInterfaceNumber;
 
 	idVendor = __le16_to_cpu(usbdev->descriptor.idVendor);