drm/i915: Move HAS_DP_MST definition to platform definition

Moving all GPU features to the platform struct definition allows for
	- standard place when adding new features from new platforms
	- possible to see supported features when dumping struct
	  definitions
Signed-off-by: Carlos Santa <carlos.santa@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

drivers/gpu/drm/i915/i915_drv.h

@@ -660,6 +660,7 @@ struct intel_csr {
 	func(has_resource_streamer) sep \
 	func(has_rc6) sep \
 	func(has_rc6p) sep \
+	func(has_dp_mst) sep \
 	func(has_pipe_cxsr) sep \
 	func(has_hotplug) sep \
 	func(cursor_needs_physical) sep \
@@ -2785,8 +2786,7 @@ struct drm_i915_cmd_table {
 
 #define HAS_IPS(dev)		(IS_HSW_ULT(dev) || IS_BROADWELL(dev))
 
-#define HAS_DP_MST(dev)		(IS_HASWELL(dev) || IS_BROADWELL(dev) || \
-				 INTEL_INFO(dev)->gen >= 9)
+#define HAS_DP_MST(dev)	(INTEL_INFO(dev)->has_dp_mst)
 
 #define HAS_DDI(dev)		(INTEL_INFO(dev)->has_ddi)
 #define HAS_FPGA_DBG_UNCLAIMED(dev)	(INTEL_INFO(dev)->has_fpga_dbg)

drivers/gpu/drm/i915/i915_pci.c

@@ -266,6 +266,7 @@ static const struct intel_device_info intel_valleyview_info = {
 	.has_fpga_dbg = 1, \
 	.has_psr = 1, \
 	.has_resource_streamer = 1, \
+	.has_dp_mst = 1, \
 	.has_rc6p = 0 /* RC6p removed-by HSW */, \
 	.has_runtime_pm = 1
 
@@ -335,6 +336,7 @@ static const struct intel_device_info intel_broxton_info = {
 	.has_csr = 1,
 	.has_resource_streamer = 1,
 	.has_rc6 = 1,
+	.has_dp_mst = 1,
 	GEN_DEFAULT_PIPEOFFSETS,
 	IVB_CURSOR_OFFSETS,
 	BDW_COLORS,