drm: use DEFINE_DYNAMIC_DEBUG_TRACE_CATEGORIES in drm

Use new macro to create a sysfs control bitmap knob to control
print-to-trace in: /sys/module/drm/parameters/trace

todo: reconsider the api, one alternative is both debug & trace terms
(2 each) given in same declarative macro; good cuz: declares bitmap
once for both interfaces, bad cuz: arg type/count handling (expecting
4 args) is ugly, esp preceding the bitmap-init args.

Signed-off-by: Jim Cromie <jim.cromie@gmail.com>

drivers/gpu/drm/drm_print.c

@@ -74,6 +74,24 @@ DEFINE_DYNAMIC_DEBUG_CATEGORIES(debug, __drm_debug,
 				[7] = { DRM_DBG_CAT_LEASE },
 				[8] = { DRM_DBG_CAT_DP },
 				[9] = { DRM_DBG_CAT_DRMRES });
+
+#ifdef CONFIG_TRACING
+unsigned long __drm_trace;
+EXPORT_SYMBOL(__drm_trace);
+DEFINE_DYNAMIC_DEBUG_TRACE_CATEGORIES(trace, __drm_trace,
+				      DRM_DEBUG_DESC,
+				      [0] = { DRM_DBG_CAT_CORE },
+				      [1] = { DRM_DBG_CAT_DRIVER },
+				      [2] = { DRM_DBG_CAT_KMS },
+				      [3] = { DRM_DBG_CAT_PRIME },
+				      [4] = { DRM_DBG_CAT_ATOMIC },
+				      [5] = { DRM_DBG_CAT_VBL },
+				      [6] = { DRM_DBG_CAT_STATE },
+				      [7] = { DRM_DBG_CAT_LEASE },
+				      [8] = { DRM_DBG_CAT_DP },
+				      [9] = { DRM_DBG_CAT_DRMRES });
+
+struct trace_array *trace_arr;
 #endif
 
 void __drm_puts_coredump(struct drm_printer *p, const char *str)