drm/omap: remove unused header tcm-sita.h

tcm-sita.h is unused since commit 0d6fa53f ("drm/omap: Use bitmaps for TILER placement")
Let's remove it.
Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

drivers/gpu/drm/omapdrm/tcm-sita.h

-/*
- * SImple Tiler Allocator (SiTA) private structures.
- *
- * Copyright (C) 2009-2011 Texas Instruments Incorporated - http://www.ti.com/
- * Author: Ravi Ramachandra <r.ramachandra@ti.com>
- *
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- *   notice, this list of conditions and the following disclaimer.
- *
- * * Redistributions in binary form must reproduce the above copyright
- *   notice, this list of conditions and the following disclaimer in the
- *   documentation and/or other materials provided with the distribution.
- *
- * * Neither the name of Texas Instruments Incorporated nor the names of
- *   its contributors may be used to endorse or promote products derived
- *   from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
- * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
- * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
- * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
- * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef _TCM_SITA_H
-#define _TCM_SITA_H
-
-#include "tcm.h"
-
-/* length between two coordinates */
-#define LEN(a, b) ((a) > (b) ? (a) - (b) + 1 : (b) - (a) + 1)
-
-enum criteria {
-	CR_MAX_NEIGHS		= 0x01,
-	CR_FIRST_FOUND		= 0x10,
-	CR_BIAS_HORIZONTAL	= 0x20,
-	CR_BIAS_VERTICAL	= 0x40,
-	CR_DIAGONAL_BALANCE	= 0x80
-};
-
-/* nearness to the beginning of the search field from 0 to 1000 */
-struct nearness_factor {
-	s32 x;
-	s32 y;
-};
-
-/*
- * Statistics on immediately neighboring slots.  Edge is the number of
- * border segments that are also border segments of the scan field.  Busy
- * refers to the number of neighbors that are occupied.
- */
-struct neighbor_stats {
-	u16 edge;
-	u16 busy;
-};
-
-/* structure to keep the score of a potential allocation */
-struct score {
-	struct nearness_factor	f;
-	struct neighbor_stats	n;
-	struct tcm_area		a;
-	u16    neighs;		/* number of busy neighbors */
-};
-
-struct sita_pvt {
-	spinlock_t lock;	/* spinlock to protect access */
-	struct tcm_pt div_pt;	/* divider point splitting container */
-	struct tcm_area ***map;	/* pointers to the parent area for each slot */
-};
-
-/* assign coordinates to area */
-static inline
-void assign(struct tcm_area *a, u16 x0, u16 y0, u16 x1, u16 y1)
-{
-	a->p0.x = x0;
-	a->p0.y = y0;
-	a->p1.x = x1;
-	a->p1.y = y1;
-}
-
-#endif