drm/i915: Don't use __func__ as prefix for drm_dbg_printer

Updated code of drm_dbg_printer() is already printing symbolic
name of the caller like drm_dbg() does.

Reviewed-by: Jani Nikula <[e-mail]>
Signed-off-by: Michal Wajdeczko <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]
Signed-off-by: Rodrigo Vivi <[e-mail]>

drivers/gpu/drm/i915/gt/intel_reset.c

···
 
 	if (GEM_SHOW_DEBUG()) {
 		struct drm_printer p = drm_dbg_printer(&gt->i915->drm,
-						       DRM_UT_DRIVER, __func__);
+						       DRM_UT_DRIVER, NULL);
 		struct intel_engine_cs *engine;
 		enum intel_engine_id id;
 

drivers/gpu/drm/i915/gt/selftest_context.c

···
 
 	if (intel_engine_pm_is_awake(engine)) {
 		struct drm_printer p = drm_dbg_printer(&engine->i915->drm,
-						       DRM_UT_DRIVER, __func__);
+						       DRM_UT_DRIVER, NULL);
 
 		intel_engine_dump(engine, &p,
 				  "%s is still awake:%d after idle-barriers\n",