soc/intel/skylake: Make use of Intel common Graphics block

TEST=Build and boot soraka/eve.

Change-Id: I416226d0374700cea6eea602f839c3d17f1f39a6
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/22615
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/soc/intel/skylake/Kconfig

@@ -61,6 +61,7 @@ config CPU_SPECIFIC_OPTIONS
 	select SOC_INTEL_COMMON_BLOCK_GPIO
 	select SOC_INTEL_COMMON_BLOCK_GPIO_PADCFG_PADTOL
 	select SOC_INTEL_COMMON_BLOCK_GPIO_LEGACY_MACROS
+	select SOC_INTEL_COMMON_BLOCK_GRAPHICS
 	select SOC_INTEL_COMMON_BLOCK_GSPI
 	select SOC_INTEL_COMMON_BLOCK_ITSS
 	select SOC_INTEL_COMMON_BLOCK_I2C