USB: imx21-hcd - fix off by one resource size calculation

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Tested-by: Jon Povey <Jon.Povey@racelogic.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/host/imx21-hcd.c

@@ -1906,7 +1906,7 @@ failed_clock_set:
 failed_clock_get:
 	iounmap(imx21->regs);
 failed_ioremap:
-	release_mem_region(res->start, res->end - res->start);
+	release_mem_region(res->start, resource_size(res));
 failed_request_mem:
 	remove_debug_files(imx21);
 	usb_put_hcd(hcd);