net: gmac_rockchip: Add Rockchip GMAC driver

Add a new driver for the GMAC ethernet interface present in Rockchip
RK3288 SOCs. This driver subclasses the generic design-ware driver to
add the glue needed specifically for Rockchip.

Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Romain Perier <romain.perier@collabora.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/drivers/net/Makefile b/drivers/net/Makefile
index 9a7bfc6..2493a48 100644
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -34,6 +34,7 @@
 obj-$(CONFIG_FTMAC110) += ftmac110.o
 obj-$(CONFIG_FTMAC100) += ftmac100.o
 obj-$(CONFIG_GRETH) += greth.o
+obj-$(CONFIG_GMAC_ROCKCHIP) += gmac_rockchip.o
 obj-$(CONFIG_DRIVER_TI_KEYSTONE_NET) += keystone_net.o
 obj-$(CONFIG_KS8851_MLL) += ks8851_mll.o
 obj-$(CONFIG_LAN91C96) += lan91c96.o