zorro: Make sysfs config attribute read-only

zorro: Make the sysfs `config' attribute read-only, as you cannot write to it
(there's no .write function neither).

Signed-off-by: Geert Uytterhoeven <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/zorro/zorro-sysfs.c

···
 static struct bin_attribute zorro_config_attr = {
 	.attr =	{
 		.name = "config",
-		.mode = S_IRUGO | S_IWUSR,
+		.mode = S_IRUGO,
 	},
 	.size = sizeof(struct ConfigDev),
 	.read = zorro_read_config,