radv: add the draw count buffer to the list of buffers

My guess is that the GPU is going to report VM faults if
vkCmdDrawIndirectCountAMD() (and friends) are used.

Cc: mesa-stable@lists.freedesktop.org
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>

src/amd/vulkan/radv_cmd_buffer.c

@@ -2992,6 +2992,8 @@ radv_emit_indirect_draw(struct radv_cmd_buffer *cmd_buffer,
 	if (count_buffer) {
 		count_va = radv_buffer_get_va(count_buffer->bo);
 		count_va += count_offset + count_buffer->offset;
+
+		cmd_buffer->device->ws->cs_add_buffer(cs, count_buffer->bo, 8);
 	}
 
 	if (!draw_count)