CONFIG_DEBUG_RMOBILE_SCIFA4 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
Kernel low-level debugging messages via SCIFA4 on SH73A0
configname: CONFIG_DEBUG_RMOBILE_SCIFA4
Kernel low-level debugging port
└─>Kernel low-level debugging messages via SCIFA4 on SH73A0
In linux kernel since version 3.19 (release Date: 2015-02-08)
Say Y here if you want kernel low-level debugging support
via SCIFA4 on Renesas SH-Mobile AG5 (SH73A0).
via SCIFA4 on Renesas SH-Mobile AG5 (SH73A0).