radv: don't overallocate depth/stencil formats

For depth/stencil formats the surface layer allocates the
stencil separately, so we don't need to include it in the
bpe.

This reduces the side of d32s8 allocates to something closer to pro.

Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Signed-off-by: Dave Airlie <airlied@redhat.com>

src/amd/vulkan/radv_image.c

@@ -72,7 +72,7 @@ radv_init_surface(struct radv_device *device,
 	surface->blk_w = vk_format_get_blockwidth(pCreateInfo->format);
 	surface->blk_h = vk_format_get_blockheight(pCreateInfo->format);
 
-	surface->bpe = vk_format_get_blocksize(pCreateInfo->format);
+	surface->bpe = vk_format_get_blocksize(vk_format_depth_only(pCreateInfo->format));
 	/* align byte per element on dword */
 	if (surface->bpe == 3) {
 		surface->bpe = 4;