Bluetooth: Rename AMP status constants and use them

The AMP controller status constants need to be actually used to avoid
crypted hardcoded numbers.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>

diff --cc include/net/bluetooth/hci.h
Simple merge

diff --cc net/bluetooth/a2mp.c
Simple merge

diff --cc net/bluetooth/hci_core.c
Simple merge