drm/amdgpu: Use kvcalloc instead of kvmalloc_array in amdgpu_cs_parser_bos()

kvmalloc_array + __GFP_ZERO is the same with kvcalloc.

Fixes the below:
drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c:873 amdgpu_cs_parser_bos() warn: Please consider using kvcalloc instead of kvmalloc_array

Cc: Christian König <christian.koenig@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c

@@ -870,9 +870,9 @@ static int amdgpu_cs_parser_bos(struct amdgpu_cs_parser *p,
 		struct amdgpu_bo *bo = e->bo;
 		int i;
 
-		e->user_pages = kvmalloc_array(bo->tbo.ttm->num_pages,
-					sizeof(struct page *),
-					GFP_KERNEL | __GFP_ZERO);
+		e->user_pages = kvcalloc(bo->tbo.ttm->num_pages,
+					 sizeof(struct page *),
+					 GFP_KERNEL);
 		if (!e->user_pages) {
 			DRM_ERROR("kvmalloc_array failure\n");
 			r = -ENOMEM;