gpio: pl061: Enable module alias autogeneration for AMBA drivers

Signed-off-by: Dave Martin <dave.martin@linaro.org>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
diff --git a/drivers/gpio/gpio-pl061.c b/drivers/gpio/gpio-pl061.c
index 093c90b..8efc3dd 100644
--- a/drivers/gpio/gpio-pl061.c
+++ b/drivers/gpio/gpio-pl061.c
@@ -350,6 +350,8 @@
 	{ 0, 0 },
 };
 
+MODULE_DEVICE_TABLE(amba, pl061_ids);
+
 static struct amba_driver pl061_gpio_driver = {
 	.drv = {
 		.name	= "pl061_gpio",