tu: Reset xfb_used at the end of a renderpass

Otherwise xfb_used could be true until the end of command buffer,
which is not what we intended it to be.

Signed-off-by: Danylo Piliaiev <dpiliaiev@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17162>

src/freedreno/vulkan/tu_cmd_buffer.c

@@ -4959,6 +4959,7 @@ tu_CmdEndRenderPass2(VkCommandBuffer commandBuffer,
    cmd_buffer->state.attachments = NULL;
    cmd_buffer->state.has_tess = false;
    cmd_buffer->state.has_subpass_predication = false;
+   cmd_buffer->state.xfb_used = false;
    cmd_buffer->state.disable_gmem = false;
    cmd_buffer->state.drawcall_count = 0;
    cmd_buffer->state.drawcall_bandwidth_per_sample_sum = 0;