net: phy: Don't limit phy addresses by default

Some boards expect to find more than one phy while other boards are old
and need to be limited to a specific phy address. Only limit the phy
address for boards that opt in.

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
diff --git a/configs/p212_defconfig b/configs/p212_defconfig
index b6923f3..44221fc 100644
--- a/configs/p212_defconfig
+++ b/configs/p212_defconfig
@@ -20,6 +20,7 @@
 CONFIG_DM_GPIO=y
 CONFIG_DM_MMC=y
 CONFIG_MMC_MESON_GX=y
+CONFIG_PHY_ADDR_ENABLE=y
 CONFIG_PHY_ADDR=8
 CONFIG_PHY_MESON_GXL=y
 CONFIG_DM_ETH=y