phylib: Add Realtek 821x eth PHY support

this PHY present on the MPC8315E and MPC837xE RDB boards.

Signed-off-by: Johnson Leung <r58129@freescale.com>
Signed-off-by: Kevin Lam <r43770@freescale.com>
Signed-off-by: Joe D'Abbraccio <ljd015@freescale.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
index 7fe03ce..f4ca059 100644
--- a/drivers/net/phy/Kconfig
+++ b/drivers/net/phy/Kconfig
@@ -60,6 +60,11 @@
 	---help---
 	  Currently supports the IP175C PHY.
 
+config REALTEK_PHY
+	tristate "Drivers for Realtek PHYs"
+	---help---
+	  Supports the Realtek 821x PHY.
+
 config FIXED_PHY
 	bool "Driver for MDIO Bus/PHY emulation with fixed speed/link PHYs"
 	---help---