CONFIG_MV64X60 is not available for thedefaultarchitecture x86.
Result is shown for architecture powerpc
default or selected kernelversion does not have config value CONFIG_MV64X60.
Result is shown for kernelversion 6.9.9

CONFIG_MV64X60 (not configurable)

configname: CONFIG_MV64X60

Linux Kernel Configuration
└─>MV64X60
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  

is selected by
CONFIG_SERIAL_MPSC