soc/intel/graphics/Kconfig: Guard options

Change-Id: I3c252e31867e4560fb5aaf12273288f4ff18ae3d
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/59471
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>

src/soc/intel/common/block/graphics/Kconfig

@@ -3,6 +3,8 @@ config SOC_INTEL_COMMON_BLOCK_GRAPHICS
 	help
 	  Intel Processor common Graphics support
 
+if SOC_INTEL_COMMON_BLOCK_GRAPHICS
+
 config SOC_INTEL_CONFIGURE_DDI_A_4_LANES
 	bool
 	help
@@ -16,3 +18,5 @@ config SOC_INTEL_DISABLE_IGD
 	  Selected by mainboard user that need to skip IGD initialization
 	  where OS can only use one GPU hence need to disable IGD and don't
 	  need to run FSP GOP.
+
+endif