[PATCH v1] fix vmwgfx compilation error due to a missing include

[Tong Zhang <ztong0001@xxxxxxxxx>]

This patch fixes vmwgfx driver compilation error due to a missing include

drivers/gpu/drm/vmwgfx/vmwgfx_drv.c: In function ‘vmw_vram_manager_init’:
drivers/gpu/drm/vmwgfx/vmwgfx_drv.c:678:8: error: implicit declaration of function ‘ttm_range_man_init’ [-Werror=implicit-function-declaration]
  678 |  ret = ttm_range_man_init(&dev_priv->bdev, TTM_PL_VRAM, false,
      |        ^~~~~~~~~~~~~~~~~~
drivers/gpu/drm/vmwgfx/vmwgfx_drv.c: In function ‘vmw_vram_manager_fini’:
drivers/gpu/drm/vmwgfx/vmwgfx_drv.c:690:2: error: implicit declaration of function ‘ttm_range_man_fini’ [-Werror=implicit-function-declaration]
  690 |  ttm_range_man_fini(&dev_priv->bdev, TTM_PL_VRAM);
      |  ^~~~~~~~~~~~~~~~~~
cc1: some warnings being treated as errors

Signed-off-by: Tong Zhang <ztong0001@xxxxxxxxx>
---
 drivers/gpu/drm/vmwgfx/vmwgfx_drv.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
index 6f5ea00973e0..6eb93aa2f311 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
@@ -37,6 +37,7 @@
 #include <drm/drm_sysfs.h>
 #include <drm/ttm/ttm_bo_driver.h>
 #include <drm/ttm/ttm_placement.h>
+#include <drm/ttm/ttm_range_manager.h>
 #include <generated/utsrelease.h>
 
 #include "ttm_object.h"
-- 
2.25.1