drm/amd/powerplay: remove unused headers

All thoses headers are not used by any source files.
Lets just remove them.
Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/inc/pp_feature.h

-/*
- * Copyright 2015 Advanced Micro Devices, Inc.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
- * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
- * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
- * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
- * OTHER DEALINGS IN THE SOFTWARE.
- *
- */
-
-#ifndef _PP_FEATURE_H_
-#define _PP_FEATURE_H_
-
-/**
- * PowerPlay feature ids.
- */
-enum pp_feature {
-	PP_Feature_PowerPlay = 0,
-	PP_Feature_User2DPerformance,
-	PP_Feature_User3DPerformance,
-	PP_Feature_VariBright,
-	PP_Feature_VariBrightOnPowerXpress,
-	PP_Feature_ReducedRefreshRate,
-	PP_Feature_GFXClockGating,
-	PP_Feature_OverdriveTest,
-	PP_Feature_OverDrive,
-	PP_Feature_PowerBudgetWaiver,
-	PP_Feature_PowerControl,
-	PP_Feature_PowerControl_2,
-	PP_Feature_MultiUVDState,
-	PP_Feature_Force3DClock,
-	PP_Feature_BACO,
-	PP_Feature_PowerDown,
-	PP_Feature_DynamicUVDState,
-	PP_Feature_VCEDPM,
-	PP_Feature_PPM,
-	PP_Feature_ACP_POWERGATING,
-	PP_Feature_FFC,
-	PP_Feature_FPS,
-	PP_Feature_ViPG,
-	PP_Feature_Max
-};
-
-/**
- * Struct for PowerPlay feature info.
- */
-struct pp_feature_info {
-	bool supported;               /* feature supported by PowerPlay */
-	bool enabled;                 /* feature enabled in PowerPlay */
-	bool enabled_default;        /* default enable status of the feature */
-	uint32_t version;             /* feature version */
-};
-
-#endif /* _PP_FEATURE_H_ */