CONFIG_MACH_JZ4780 is not available for thedefaultarchitecture x86.
Result is shown for architecture mips

CONFIG_MACH_JZ4780 (not configurable)

configname: CONFIG_MACH_JZ4780

Linux Kernel Configuration
└─>MACH_JZ4780
In linux kernel since version 3.10 (release Date: 2013-06-30)