CONFIG_SH_R7780MP is not available for thedefaultarchitecture x86.
Result is shown for architecture sh

R7780MP board support

modulename: irq-r7780mp.ko

configname: CONFIG_SH_R7780MP

Highlander options
└─>R7780MP board support
In linux kernel since version 2.6.19 (release Date: 2006-11-29)  
Selecting this option will enable support for the mass-production
version of the R7780RP. If in doubt, say Y.

source code:
arch/sh/boards/mach-highlander/irq-r7780mp.c