WIP: Bluetooth: Use hci request for LE connection

Signed-off-by: Andre Guedes <andre.guedes@openbossa.org>
WIP: Bluetooth: Remove hci_le_create_connection

Since we now use create_le_connection helper, we can remove
hci_le_create_connection.

Signed-off-by: Andre Guedes <andre.guedes@openbossa.org>
Bluetooth: Remove hci_cs_le_create_conn event handler

This patch removes the hci_cs_le_create_conn event handler since since
this handling is now done in initiate_le_connection_complete callback
in hci_conn.c.

Signed-off-by: Andre Guedes <andre.guedes@openbossa.org>
WIP: Bluetooth: Refactor hci_connect_le

Signed-off-by: Andre Guedes <andre.guedes@openbossa.org>