drm/vmwgfx: stop using TTM_MEMTYPE_FLAG_MAPPABLE

The driver doesn't expose any not-mapable memory resources.
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/378241/

drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c

@@ -742,15 +742,13 @@ static int vmw_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
 	switch (type) {
 	case TTM_PL_SYSTEM:
 		/* System memory */
-
-		man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
 		man->available_caching = TTM_PL_FLAG_CACHED;
 		man->default_caching = TTM_PL_FLAG_CACHED;
 		break;
 	case TTM_PL_VRAM:
 		/* "On-card" video ram */
 		man->func = &vmw_thp_func;
-		man->flags = TTM_MEMTYPE_FLAG_FIXED | TTM_MEMTYPE_FLAG_MAPPABLE;
+		man->flags = TTM_MEMTYPE_FLAG_FIXED;
 		man->available_caching = TTM_PL_FLAG_CACHED;
 		man->default_caching = TTM_PL_FLAG_CACHED;
 		break;
@@ -762,7 +760,6 @@ static int vmw_init_mem_type(struct ttm_bo_device *bdev, uint32_t type,
 		 *  slots as well as the bo size.
 		 */
 		man->func = &vmw_gmrid_manager_func;
-		man->flags = TTM_MEMTYPE_FLAG_MAPPABLE;
 		man->available_caching = TTM_PL_FLAG_CACHED;
 		man->default_caching = TTM_PL_FLAG_CACHED;
 		break;
@@ -789,7 +786,6 @@ static int vmw_verify_access(struct ttm_buffer_object *bo, struct file *filp)
 
 static int vmw_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
 {
-	struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
 	struct vmw_private *dev_priv = container_of(bdev, struct vmw_private, bdev);
 
 	mem->bus.addr = NULL;
@@ -797,8 +793,7 @@ static int vmw_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_mem_reg
 	mem->bus.offset = 0;
 	mem->bus.size = mem->num_pages << PAGE_SHIFT;
 	mem->bus.base = 0;
-	if (!(man->flags & TTM_MEMTYPE_FLAG_MAPPABLE))
-		return -EINVAL;
+
 	switch (mem->mem_type) {
 	case TTM_PL_SYSTEM:
 	case VMW_PL_GMR: