Revert "Bluetooth: Remove unused hci_le_ltk_reply()"

* Pretty sure this is breaking bluetooth

This reverts commit 8b97ab6815b01401607f91cdad10db55f0490eb8.

(cherry picked from commit fc5c34fb96db4636e7e595676fecb876594ab2c1)
include: export linux/nfc headers

Change-Id: I2538b3d96fc3e61e8a0e4306db9f6c401ff845a2
(cherry picked from commit c4e2cdbb6f4681b47131ed816f553d28c82c715e)
update pn544 headers

Change-Id: I8111900ce8245574b6ef111ee814b466d3ec77a0
(cherry picked from commit b2c88c69c9042390c2eacad47f38eb299250ab95)
more pn544 hearder cleanup

Change-Id: I7bfc9e84b5da9f70a9c4ce3f0fc14f4b6ca3a1fd
(cherry picked from commit 91083038bfc2c1ded14a74e04629db7eb9bec159)