config NET_VENDOR_SUNPLUS
	bool "Sunplus devices"
	default y
	depends on ARCH_SUNPLUS

Does it actually depend on ARCH_SUNPLUS? What do you make use of?

Ideally, you want it to also build with COMPILE_TEST, so that the
driver gets build by 0-day and all the other build bots.

	---help---
	  If you have a network (Ethernet) card belonging to this
	  class, say Y here.

	  Note that the answer to this question doesn't directly
	  affect the kernel: saying N will just cause the configurator
	  to skip all the questions about Sunplus cards. If you say Y,
	  you will be asked for your specific card in the following
	  questions.

if NET_VENDOR_SUNPLUS

config SP7021_EMAC
	tristate "Sunplus Dual 10M/100M Ethernet (with L2 switch) devices"
	depends on ETHERNET && SOC_SP7021

Does it actually depend on SOC_SP7021 to build?

     Andrew