ACPI: IORT: Add extra message "applying workaround" for off-by-1 issue

As we already applied a workaround for the off-by-1 issue,
it's good to add extra message "applying workaround" to make
people less uneasy to see FW_BUG message in the boot log.

Signed-off-by: Hanjun Guo <[e-mail]>
Acked-by: Ard Biesheuvel <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Will Deacon <[e-mail]>

drivers/acpi/arm64/iort.c

···
 		       map, rid_in);
 		if (rid_in != map->input_base)
 			return -ENXIO;
+
+		pr_err(FW_BUG "applying workaround.\n");
 	}
 
 	*rid_out = map->output_base + (rid_in - map->input_base);