disk: convert CONFIG_ISO_PARTITION to Kconfig

cmd/bootefi.c

configs/A10-OLinuXino-Lime_defconfig

configs/A10s-OLinuXino-M_defconfig

configs/A13-OLinuXinoM_defconfig

configs/A13-OLinuXino_defconfig

configs/A20-OLinuXino-Lime2_defconfig

configs/A20-OLinuXino-Lime_defconfig

configs/A20-OLinuXino_MICRO_defconfig

configs/A20-Olimex-SOM-EVB_defconfig

configs/A33-OLinuXino_defconfig

configs/Ainol_AW1_defconfig

configs/Ampe_A76_defconfig

configs/Auxtek-T003_defconfig

configs/Auxtek-T004_defconfig

configs/Bananapi_defconfig

configs/Bananapro_defconfig

configs/CHIP_defconfig

configs/CSQ_CS908_defconfig

configs/Chuwi_V7_CW0825_defconfig

configs/Colombus_defconfig