drivers: bluetooth: hci: add host wakeup for IW612 BT controller

Add wakeup IO config for IW612 shield for BT host wakeup
functionality.
Add kconfig to enable/disable BT host wakeup functionality
Add kconfig to toggle onboard LED upon detecting BT activity

Signed-off-by: Vinit Mehta <vinit.mehta@nxp.com>
4 files changed