drm/i915/skl: SKL FBC enablement

Enable FBC feature on Skylake

Issue: VIZ-3788
Reviewed-by: NThomas Wood <thomas.wood@intel.com>
Signed-off-by: NDaisy Sun <daisy.sun@intel.com>
Signed-off-by: NDamien Lespiau <damien.lespiau@intel.com>
Signed-off-by: NDaniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/i915_drv.c

@@ -364,6 +364,7 @@ static const struct intel_device_info intel_skylake_info = {
 	.ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING,
 	.has_llc = 1,
 	.has_ddi = 1,
+	.has_fbc = 1,
 	GEN_DEFAULT_PIPEOFFSETS,
 	IVB_CURSOR_OFFSETS,
 };