rtc: pl031: Enable module alias autogeneration for AMBA drivers

Signed-off-by: Dave Martin <dave.martin@linaro.org>
diff --git a/drivers/rtc/rtc-pl031.c b/drivers/rtc/rtc-pl031.c
index ff1b84b..a952c8d 100644
--- a/drivers/rtc/rtc-pl031.c
+++ b/drivers/rtc/rtc-pl031.c
@@ -420,6 +420,8 @@
 	{0, 0},
 };
 
+MODULE_DEVICE_TABLE(amba, pl031_ids);
+
 static struct amba_driver pl031_driver = {
 	.drv = {
 		.name = "rtc-pl031",