drm/i915/gvt: Support GVT-g on Skylake

GVT-g supports Intel Skylake platform. Enable it.
Signed-off-by: NZhi Wang <zhi.a.wang@intel.com>
Signed-off-by: NZhenyu Wang <zhenyuw@linux.intel.com>

drivers/gpu/drm/i915/intel_gvt.c

@@ -39,6 +39,8 @@ static bool is_supported_device(struct drm_i915_private *dev_priv)
 {
 	if (IS_BROADWELL(dev_priv))
 		return true;
+	if (IS_SKYLAKE(dev_priv))
+		return true;
 	return false;
 }