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/udoo_defconfig b/configs/udoo_defconfig
index 794e00c..4858271 100644
--- a/configs/udoo_defconfig
+++ b/configs/udoo_defconfig
@@ -31,5 +31,6 @@
 CONFIG_CMD_FAT=y
 CONFIG_CMD_FS_GENERIC=y
 CONFIG_DM=y
+CONFIG_PHYLIB=y
 CONFIG_DM_THERMAL=y
 CONFIG_OF_LIBFDT=y