drm/i915/gvt: Remove defunct vmap_batch()

This code was removed from i915_cmd_parser.c but still an obsolete
version wound up being duplicated into gvt/cmd_parser.c. Good riddance.
Signed-off-by: NChris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: NZhenyu Wang <zhenyuw@linux.intel.com>

drivers/gpu/drm/i915/gvt/cmd_parser.c

@@ -1583,44 +1583,6 @@ static uint32_t find_bb_size(struct parser_exec_state *s)
 	return bb_size;
 }
 
-static u32 *vmap_batch(struct drm_i915_gem_object *obj,
-		       unsigned int start, unsigned int len)
-{
-	int i;
-	void *addr = NULL;
-	struct sg_page_iter sg_iter;
-	int first_page = start >> PAGE_SHIFT;
-	int last_page = (len + start + 4095) >> PAGE_SHIFT;
-	int npages = last_page - first_page;
-	struct page **pages;
-
-	pages = drm_malloc_ab(npages, sizeof(*pages));
-	if (pages == NULL) {
-		DRM_DEBUG_DRIVER("Failed to get space for pages\n");
-		goto finish;
-	}
-
-	i = 0;
-	for_each_sg_page(obj->pages->sgl, &sg_iter, obj->pages->nents,
-			 first_page) {
-		pages[i++] = sg_page_iter_page(&sg_iter);
-		if (i == npages)
-			break;
-	}
-
-	addr = vmap(pages, i, 0, PAGE_KERNEL);
-	if (addr == NULL) {
-		DRM_DEBUG_DRIVER("Failed to vmap pages\n");
-		goto finish;
-	}
-
-finish:
-	if (pages)
-		drm_free_large(pages);
-	return (u32 *)addr;
-}
-
-
 static int perform_bb_shadow(struct parser_exec_state *s)
 {
 	struct intel_shadow_bb_entry *entry_obj;