usb: misc: usb3503: Add USB3503A to the compatible list

There are no software visible differences that I am aware of but in case
any are discovered allow the DTS to specify exactly which device is
present.

Signed-off-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/usb/misc/usb3503.c b/drivers/usb/misc/usb3503.c
index 8f5dff2..da45ed9 100644
--- a/drivers/usb/misc/usb3503.c
+++ b/drivers/usb/misc/usb3503.c
@@ -272,6 +272,7 @@
 #ifdef CONFIG_OF
 static const struct of_device_id usb3503_of_match[] = {
 	{ .compatible = "smsc,usb3503", },
+	{ .compatible = "smsc,usb3503a", },
 	{},
 };
 MODULE_DEVICE_TABLE(of, usb3503_of_match);