Bluetooth: hci_intel: switch to list_for_each_entry()

There is no need to have list_for_each() followed by list_entry()
when we simply may use list_for_each_entry() directly.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>