drm/i915: Remove intel_dsi_cmd.h

This header has been unusued since:

  commit 063c86f6
  Author: Jani Nikula <jani.nikula@intel.com>
  Date:   Fri Jan 16 14:27:27 2015 +0200

      drm/i915/dsi: remove intel_dsi_cmd.c and the unused functions therein
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_dsi_cmd.h

-/*
- * Copyright © 2013 Intel Corporation
- *
- * 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 (including the next
- * paragraph) 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 AUTHORS OR COPYRIGHT HOLDERS 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.
- *
- * Author: Jani Nikula <jani.nikula@intel.com>
- */
-
-#ifndef _INTEL_DSI_DSI_H
-#define _INTEL_DSI_DSI_H
-
-#include <drm/drmP.h>
-#include <drm/drm_crtc.h>
-#include <video/mipi_display.h>
-#include "i915_drv.h"
-#include "intel_drv.h"
-#include "intel_dsi.h"
-
-void dsi_hs_mode_enable(struct intel_dsi *intel_dsi, bool enable,
-						enum port port);
-
-#endif /* _INTEL_DSI_DSI_H */