Move PHY_MICREL and PHY_MICREL_KSZ90X1 to Kconfig

Signed-off-by: Alexandru Gagniuc <alex.g@adaptrum.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/configs/microblaze-generic_defconfig b/configs/microblaze-generic_defconfig
index 3d84cf2..12dcd00 100644
--- a/configs/microblaze-generic_defconfig
+++ b/configs/microblaze-generic_defconfig
@@ -36,6 +36,8 @@
 CONFIG_NETCONSOLE=y
 CONFIG_SPL_DM=y
 CONFIG_MTD_NOR_FLASH=y
+CONFIG_PHY_MICREL=y
+CONFIG_PHY_MICREL_KSZ90X1=y
 CONFIG_DM_ETH=y
 CONFIG_XILINX_AXIEMAC=y
 CONFIG_XILINX_EMACLITE=y