mac802154: ops: declare channel and page as u8

The range of channel and page fits into an unsigned byte range. This
patch changes the set_channel parameter definitions for channel and
page to u8.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Cc: Alan Ott <alan@signal11.us>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/include/net/mac802154.h b/include/net/mac802154.h
index 0ea44cd..85a4efc 100644
--- a/include/net/mac802154.h
+++ b/include/net/mac802154.h
@@ -178,9 +178,8 @@
 	int		(*xmit_async)(struct ieee802154_hw *hw,
 				      struct sk_buff *skb);
 	int		(*ed)(struct ieee802154_hw *hw, u8 *level);
-	int		(*set_channel)(struct ieee802154_hw *hw,
-				       int page,
-				       int channel);
+	int		(*set_channel)(struct ieee802154_hw *hw, u8 page,
+				       u8 channel);
 	int		(*set_hw_addr_filt)(struct ieee802154_hw *hw,
 					    struct ieee802154_hw_addr_filt *filt,
 					    unsigned long changed);