soc/intel/denverton_ns: Allow using FSP repo

This commit is adding a dependency check for the FSP_USE_REPO
config option which so far was not able to deal with Denverton
systems.

Change-Id: I615305da5865bef305f560f5c90482cf0937b25a
Signed-off-by: Felix Singer <felixsinger@posteo.net>
Signed-off-by: Johanna Schander <coreboot@mimoja.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/30931
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Michael Niewöhner

src/drivers/intel/fsp2_0/Kconfig

@@ -55,7 +55,8 @@ config FSP_USE_REPO
 	depends on ADD_FSP_BINARIES
 	depends on SOC_INTEL_APOLLOLAKE || SOC_INTEL_SKYLAKE || \
 		SOC_INTEL_KABYLAKE || SOC_INTEL_COFFEELAKE || \
-		SOC_INTEL_ICELAKE  || SOC_INTEL_WHISKEYLAKE
+		SOC_INTEL_ICELAKE  || SOC_INTEL_WHISKEYLAKE || \
+		SOC_INTEL_DENVERTON_NS
 	help
 	  When selecting this option, the SoC must set FSP_HEADER_PATH
 	  and FSP_FD_PATH correctly so FSP splitting works.