ieee802154: rename wpan_phy_alloc

This patch renames the wpan_phy_alloc function to wpan_phy_new. This
naming convention is like wireless and "wiphy_new" function.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

diff --cc include/net/cfg802154.h
Simple merge

diff --cc net/ieee802154/core.c
Simple merge

diff --cc net/mac802154/main.c
Simple merge