CONFIG_CPU_SUBTYPE_SH7263 is not available for thedefaultarchitecture x86.
Result is shown for architecture sh

Support SH7263 processor

modulename: setup-sh7203.ko

configname: CONFIG_CPU_SUBTYPE_SH7263

Processor sub-type selection
└─>Support SH7263 processor
In linux kernel since version 2.6.25 (release Date: 2008-04-16)  
source code:
arch/sh/kernel/cpu/sh2a/