CONFIG_MPC8555 is not available for thedefaultarchitecture x86.
Result is shown for architecture ppc
default or selected kernelversion does not have config value CONFIG_MPC8555.
Result is shown for kernelversion 5.4.123

CONFIG_MPC8555 (not configurable)

configname: CONFIG_MPC8555

Linux Kernel Configuration
└─>Freescale 85xx options
└─>MPC8555
In linux kernel since version 2.6.12