soc/intel/skylake: enable VMX support

Use soc/common VMX block to enable VMX on supported devices.

Change-Id: Iaa1a6201b431783d709c0509715fa8e8b1ce349a
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/25332
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Youness Alaoui <snifikino@gmail.com>

src/soc/intel/skylake/Kconfig

@@ -84,6 +84,7 @@ config CPU_SPECIFIC_OPTIONS
 	select SOC_INTEL_COMMON_BLOCK_SPI
 	select SOC_INTEL_COMMON_BLOCK_TIMER
 	select SOC_INTEL_COMMON_BLOCK_UART
+	select SOC_INTEL_COMMON_BLOCK_VMX
 	select SOC_INTEL_COMMON_BLOCK_XHCI
 	select SOC_INTEL_COMMON_GFX_OPREGION
 	select SOC_INTEL_COMMON_NHLT