Staging: udlfb: 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: Bernie Thompson <[e-mail]>
Cc: stable <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/udlfb/udlfb.c

···
 	__ATTR_RO(metrics_bytes_identical),
 	__ATTR_RO(metrics_bytes_sent),
 	__ATTR_RO(metrics_cpu_kcycles_used),
-	__ATTR(metrics_reset, S_IRUSR, NULL, metrics_reset_store),
+	__ATTR(metrics_reset, S_IWUSR, NULL, metrics_reset_store),
 };
 
 /*