mac802154: change pan_coord type to bool

To indicate if it's a coordinator or not a bool is enough. There should
no more values available which represent some other state.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Reviewed-by: Varka Bhadram <varkabhadram@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/include/net/mac802154.h b/include/net/mac802154.h
index 095c9d0..de1cdde9 100644
--- a/include/net/mac802154.h
+++ b/include/net/mac802154.h
@@ -71,7 +71,7 @@
 	__le16	pan_id;
 	__le16	short_addr;
 	__le64	ieee_addr;
-	u8	pan_coord;
+	bool	pan_coord;
 };
 
 /**