HID: roccat-koneplus: vorrect mode of sysfs attr 'sensor'

Mode of sysfs attribute 'sensor' was wrongly set to writeonly.
Corrected this to readwrite.

Signed-off-by: Stefan Achatz <erazor_de@users.sourceforge.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/drivers/hid/hid-roccat-koneplus.c b/drivers/hid/hid-roccat-koneplus.c
index a8e2117..33eec74 100644
--- a/drivers/hid/hid-roccat-koneplus.c
+++ b/drivers/hid/hid-roccat-koneplus.c
@@ -460,7 +460,7 @@
 
 static struct bin_attribute koneplus_bin_attributes[] = {
 	{
-		.attr = { .name = "sensor", .mode = 0220 },
+		.attr = { .name = "sensor", .mode = 0660 },
 		.size = sizeof(struct koneplus_sensor),
 		.read = koneplus_sysfs_read_sensor,
 		.write = koneplus_sysfs_write_sensor