CONFIG_DEBUG_RCAR_GEN2_SCIF0 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
Kernel low-level debugging messages via SCIF0 on R-Car Gen2 and RZ/G1
configname: CONFIG_DEBUG_RCAR_GEN2_SCIF0
Kernel low-level debugging port
└─>Kernel low-level debugging messages via SCIF0 on R-Car Gen2 and RZ/G1
In linux kernel since version 3.19 (release Date: 2015-02-08)
Say Y here if you want kernel low-level debugging support
via SCIF0 on Renesas RZ/G1M (R8A7743), RZ/G1N (R8A7744),
R-Car H2 (R8A7790), M2-W (R8A7791), V2H (R8A7792), or
M2-N (R8A7793).
via SCIF0 on Renesas RZ/G1M (R8A7743), RZ/G1N (R8A7744),
R-Car H2 (R8A7790), M2-W (R8A7791), V2H (R8A7792), or
M2-N (R8A7793).