[NET]: Add support for the RDC R6040 Fast Ethernet controller

This patch adds support for the RDC R6040 MAC we can find in the RDC
R-321x System-on-chips.

Signed-off-by: Sten Wang <sten.wang@rdc.com.tw>
Signed-off-by: Daniel Gimpelevich <daniel@gimpelevich.san-francisco.ca.us>
Signed-off-by: Florian Fainelli <florian.fainelli@telecomint.eu>
diff --git a/drivers/net/Makefile b/drivers/net/Makefile
index a2f2662..5dd2d5e 100644
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -55,6 +55,7 @@
 obj-$(CONFIG_EPIC100) += epic100.o
 obj-$(CONFIG_SIS190) += sis190.o
 obj-$(CONFIG_SIS900) += sis900.o
+obj-$(CONFIG_R6040) += r6040.o
 obj-$(CONFIG_YELLOWFIN) += yellowfin.o
 obj-$(CONFIG_ACENIC) += acenic.o
 obj-$(CONFIG_ISERIES_VETH) += iseries_veth.o