sis_main.c - vfree() checking cleanups

@@ -5676,7 +5676,7 @@
 	iounmap(ivideo->video_vbase);
 	iounmap(ivideo->mmio_vbase);
 	if(ivideo->bios_vbase) iounmap(ivideo->bios_vbase);
-	if(ivideo->bios_abase)    vfree(ivideo->bios_abase);
+	vfree(ivideo->bios_abase);
 
 	/* Release mem regions */
 	release_mem_region(ivideo->video_base, ivideo->video_size);