Move PHY_MICREL and PHY_MICREL_KSZ90X1 to Kconfig

configs/Cyrus_P5020_defconfig

configs/Cyrus_P5040_defconfig

configs/alt_defconfig

configs/apalis_imx6_defconfig

configs/apalis_imx6_nospl_com_defconfig

configs/apalis_imx6_nospl_it_defconfig

configs/aristainetos2_defconfig

configs/aristainetos2b_defconfig

configs/aristainetos_defconfig

configs/bk4r1_defconfig

configs/colibri_imx6_defconfig

configs/colibri_imx6_nospl_defconfig

configs/colibri_imx7_defconfig

configs/colibri_vf_defconfig

configs/flea3_defconfig

configs/gose_defconfig

configs/k2g_evm_defconfig

configs/k2g_hs_evm_defconfig

configs/koelsch_defconfig

configs/lager_defconfig