There a few instances still using HCI_MAX_AD_LENGTH instead of using
max_adv_len which takes care of detecting what is the actual maximum
length depending on if the controller supports EA or not.

Fixes: 112b5090 ("Bluetooth: MGMT: Fix always using HCI_MAX_AD_LENGTH")
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>