ieee802154: remove default channel settings

This patch removes the default channel setting. A channel is always set
and there is no default channel setting according 802.15.4.

Drivers should set the default channel and page in probing routine. This
behaviour is currently a lack of all 802.15.4 drivers.
Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

net/ieee802154/core.c

@@ -100,9 +100,6 @@ struct wpan_phy *wpan_phy_alloc(size_t priv_size)
 
 	phy->dev.class = &wpan_phy_class;
 
-	phy->current_channel = -1; /* not initialised */
-	phy->current_page = 0; /* for compatibility */
-
 	return phy;
 
 out: