mac802154: change module description

This patch changes the module description like wireless which is IEEE
802.11 "subsystem" and not "implementation".

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/net/mac802154/main.c b/net/mac802154/main.c
index 24e8ca6..40a32640 100644
--- a/net/mac802154/main.c
+++ b/net/mac802154/main.c
@@ -182,5 +182,5 @@
 }
 EXPORT_SYMBOL(ieee802154_unregister_hw);
 
-MODULE_DESCRIPTION("IEEE 802.15.4 implementation");
+MODULE_DESCRIPTION("IEEE 802.15.4 subsystem");
 MODULE_LICENSE("GPL v2");