ARM: reduce defconfigs

arch/arm/configs/acs5k_defconfig

arch/arm/configs/acs5k_tiny_defconfig

arch/arm/configs/afeb9260_defconfig

arch/arm/configs/am200epdkit_defconfig

arch/arm/configs/am3517_evm_defconfig

arch/arm/configs/ams_delta_defconfig

arch/arm/configs/ap4evb_defconfig

arch/arm/configs/assabet_defconfig

arch/arm/configs/at572d940hfek_defconfig

arch/arm/configs/at91cap9adk_defconfig

arch/arm/configs/at91rm9200dk_defconfig

arch/arm/configs/at91rm9200ek_defconfig

arch/arm/configs/at91sam9260ek_defconfig

arch/arm/configs/at91sam9261ek_defconfig

arch/arm/configs/at91sam9263ek_defconfig

arch/arm/configs/at91sam9g20ek_defconfig

arch/arm/configs/at91sam9rlek_defconfig

arch/arm/configs/ateb9200_defconfig

arch/arm/configs/badge4_defconfig

arch/arm/configs/bcmring_defconfig