Staging: frontier: fix up my fixup for some sysfs attribute permissions

They should be writable by root, not readable.
Doh, stupid me with the wrong flags.

Reported-by: Jonathan Cameron <[e-mail]>
Cc: David Taht <[e-mail]>
Cc: stable <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/frontier/tranzport.c

···
 		t->value = temp;	\
 		return count;	\
 	}	\
-	static DEVICE_ATTR(value, S_IRUSR | S_IRUGO, show_##value, set_##value);
+	static DEVICE_ATTR(value, S_IWUSR | S_IRUGO, show_##value, set_##value);
 
 show_int(enable);
 show_int(offline);