Bluetooth: btintel: Add btintel data struct

This patch adds a data structure for btintel for btintel object, and the
definition of bootloder states. It also adds macros to set/test/clear
the flags.

Signed-off-by: Tedd Ho-Jeong An <tedd.an@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>