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/MPC8308RDB_defconfig b/configs/MPC8308RDB_defconfig
index 10ff9cf..ce131c1 100644
--- a/configs/MPC8308RDB_defconfig
+++ b/configs/MPC8308RDB_defconfig
@@ -17,5 +17,6 @@
 CONFIG_CMD_DATE=y
 CONFIG_CMD_FAT=y
 CONFIG_MTD_NOR_FLASH=y
+CONFIG_PHYLIB=y
 CONFIG_SYS_NS16550=y
 CONFIG_OF_LIBFDT=y