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/colibri_vf_defconfig b/configs/colibri_vf_defconfig
index 46cb9b1..810a7e3 100644
--- a/configs/colibri_vf_defconfig
+++ b/configs/colibri_vf_defconfig
@@ -43,6 +43,7 @@
 CONFIG_SYS_NAND_VF610_NFC_60_ECC_BYTES=y
 CONFIG_MTD_UBI_FASTMAP=y
 CONFIG_PHYLIB=y
+CONFIG_PHY_MICREL=y
 CONFIG_DM_SERIAL=y
 CONFIG_FSL_LPUART=y
 CONFIG_DM_SPI=y