CONFIG_MACH_JZ4740 is not available for thedefaultarchitecture x86.
Result is shown for architecture mips

CONFIG_MACH_JZ4740 (not configurable)

modulename: jz4740-cgu.ko

configname: CONFIG_MACH_JZ4740

Linux Kernel Configuration
└─>MACH_JZ4740
In linux kernel since version 2.6.36 (release Date: 2010-10-20)  
source code:
drivers/clk/ingenic/jz4740-cgu.c