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/bcm958300k-ns_defconfig b/configs/bcm958300k-ns_defconfig
index 19eca9d..f30f1bf 100644
--- a/configs/bcm958300k-ns_defconfig
+++ b/configs/bcm958300k-ns_defconfig
@@ -21,6 +21,7 @@
 CONFIG_CMD_FAT=y
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
 # CONFIG_MMC is not set
+CONFIG_PHY_BROADCOM=y
 CONFIG_CONS_INDEX=3
 CONFIG_SYS_NS16550=y
 CONFIG_SHA1=y