drm/i915/skl: Drop the preliminary_hw_support flag

Time to light a candle and remove the preliminary_hw_support flag.
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/i915_drv.c

@@ -356,7 +356,6 @@ static const struct intel_device_info intel_cherryview_info = {
 };
 
 static const struct intel_device_info intel_skylake_info = {
-	.is_preliminary = 1,
 	.is_skylake = 1,
 	.gen = 9, .num_pipes = 3,
 	.need_gfx_hws = 1, .has_hotplug = 1,
@@ -369,7 +368,6 @@ static const struct intel_device_info intel_skylake_info = {
 };
 
 static const struct intel_device_info intel_skylake_gt3_info = {
-	.is_preliminary = 1,
 	.is_skylake = 1,
 	.gen = 9, .num_pipes = 3,
 	.need_gfx_hws = 1, .has_hotplug = 1,