quoted

How about we do the following.

config LANTIQ
	select PINCTRL

config PINCTRL_LANTIQ
	def_bool y
	depends on LANTIQ

config PINCTRL_LANTIQ_XWAY
	def_bool y
	depends on SOC_TYPE_XWAY

This would auto select the right symbols, have all the dependency logic
in 1 place and reduce the size of arch/mips/lantiq/Kconfig

Is it useful to build a kernel for XWAY without pinctrl, once the driver
is there? That's the main difference between arch/mips/lantiq/Kconfig
selecting PINCTRL_LANTIQ_XWAY vs that being a def_bool, and hence
allowing the user to deselect it.

it would not make sense to build an image without.

config LANTIQ and config SOC_TYPE_XWAY should explicitly select the
symbols that they need.