Revert "amdgpu/dc: drop display_pipe_clocks.c."

This reverts commit b3fbdcec.

Unfortunately these clash with our DML update from the HW guys
as it's starting to get used now.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dml/Makefile

@@ -13,7 +13,7 @@ CFLAGS_dml_common_defs.o := -mhard-float -msse -mpreferred-stack-boundary=4
 CFLAGS_display_mode_support.o := -mhard-float -msse -mpreferred-stack-boundary=4
 
 
-DML = display_mode_lib.o display_rq_dlg_calc.o \
+DML = display_mode_lib.o display_pipe_clocks.o display_rq_dlg_calc.o \
 	  display_rq_dlg_helpers.o display_watermark.o \
 	  soc_bounding_box.o dml_common_defs.o display_mode_support.o
 

drivers/gpu/drm/amd/display/dc/dml/display_mode_lib.h

@@ -28,6 +28,7 @@
 #include "dml_common_defs.h"
 #include "soc_bounding_box.h"
 #include "display_watermark.h"
+#include "display_pipe_clocks.h"
 #include "display_rq_dlg_calc.h"
 #include "display_mode_support.h"
 

drivers/gpu/drm/amd/display/dc/dml/display_pipe_clocks.h

+/*
+ * Copyright 2017 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.
+ *
+ * Authors: AMD
+ *
+ */
+#ifndef __DISPLAY_PIPE_CLOCKS_H__
+#define __DISPLAY_PIPE_CLOCKS_H__
+
+#include "dml_common_defs.h"
+
+struct display_mode_lib;
+
+struct _vcs_dpi_display_pipe_clock_st dml_clks_get_pipe_clocks(
+		struct display_mode_lib *mode_lib,
+		struct _vcs_dpi_display_e2e_pipe_params_st *e2e,
+		unsigned int num_pipes);
+
+bool dml_clks_pipe_clock_requirement_fit_power_constraint(
+		struct display_mode_lib *mode_lib,
+		struct _vcs_dpi_display_e2e_pipe_params_st *e2e,
+		unsigned int num_dpp_in_grp);
+#endif