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/flea3_defconfig b/configs/flea3_defconfig
index ae7f6a4..f4a0b05 100644
--- a/configs/flea3_defconfig
+++ b/configs/flea3_defconfig
@@ -19,6 +19,7 @@
 CONFIG_CMD_MTDPARTS=y
 # CONFIG_MMC is not set
 CONFIG_MTD_NOR_FLASH=y
+CONFIG_PHYLIB=y
 CONFIG_OF_LIBFDT=y
 CONFIG_FDT_FIXUP_PARTITIONS=y
 # CONFIG_EFI_LOADER is not set