Convert CONFIG_PHYLIB et al to Kconfig

This converts the following to Kconfig:
   CONFIG_PHYLIB
   CONFIG_BITBANGMII
   CONFIG_MV88E6352_SWITCH
   CONFIG_MV88E61XX_SWITCH
   CONFIG_PHYLIB_10G
   CONFIG_PHY_AQUANTIA
   CONFIG_PHY_ATHEROS
   CONFIG_PHY_BROADCOM
   CONFIG_PHY_CORTINA
   CONFIG_PHY_DAVICOM
   CONFIG_PHY_ET1011C
   CONFIG_PHY_LXT
   CONFIG_PHY_MARVELL
   CONFIG_PHY_MICREL
   CONFIG_PHY_NATSEMI
   CONFIG_PHY_REALTEK
   CONFIG_RTL8211X_PHY_FORCE_MASTER
   CONFIG_PHY_SMSC
   CONFIG_PHY_TERANETICS
   CONFIG_PHY_TI
   CONFIG_PHY_VITESSE
   CONFIG_PHY_XILINX

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/Hummingbird_A31_defconfig b/configs/Hummingbird_A31_defconfig
index 15984ec..6798698 100644
--- a/configs/Hummingbird_A31_defconfig
+++ b/configs/Hummingbird_A31_defconfig
@@ -9,6 +9,7 @@
 CONFIG_VIDEO_VGA_EXTERNAL_DAC_EN="PH25"
 # CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
 CONFIG_DEFAULT_DEVICE_TREE="sun6i-a31-hummingbird"
+CONFIG_PHY_REALTEK=y
 CONFIG_ETH_DESIGNWARE=y
 CONFIG_RGMII=y
 CONFIG_MII=y