Move PHYLIB to Kconfig

Signed-off-by: Alexandru Gagniuc <alex.g@adaptrum.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/configs/P1020MBG-PC_defconfig b/configs/P1020MBG-PC_defconfig
index 65b1e9f..f8b7fc5 100644
--- a/configs/P1020MBG-PC_defconfig
+++ b/configs/P1020MBG-PC_defconfig
@@ -21,6 +21,7 @@
 CONFIG_CMD_EXT2=y
 CONFIG_CMD_FAT=y
 CONFIG_MTD_NOR_FLASH=y
+CONFIG_PHYLIB=y
 CONFIG_NETDEVICES=y
 CONFIG_E1000=y
 CONFIG_SYS_NS16550=y