x86: Call bootm_final()

The x86 code in bootm_announce_and_cleanup() is very similar to the new
bootm_final() function, so just use the latter. Move over a useful
comment.

Signed-off-by: Simon Glass <sjg@chromium.org>

boot/bootm_final.c

@@ -18,5 +18,10 @@ void bootm_final(enum bootm_final_t flags)
 	if (IS_ENABLED(CONFIG_BOOTSTAGE_REPORT))
 		bootstage_report();
 
+	/*
+	 * Call remove function of all devices with a removal flag set.
+	 * This may be useful for last-stage operations, like cancelling
+	 * of DMA operation or releasing device internal buffers.
+	 */
 	dm_remove_devices_active();
 }