CONFIG_ARCH_SHMOBILE is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
Renesas SH-Mobile
configname: CONFIG_ARCH_SHMOBILE
ARM system type
└─>Renesas SH-Mobile
In linux kernel since version 2.6.30 (release Date: 2009-06-09)
Support for Renesas's SH-Mobile ARM platforms