core/gatt: Parse InProgress error code from err_msg

core/gatt: Parse InProgress error code from err_msg

In Common Profile and Service Error Code descriptions (Supplement
to Bluetooth Core Specification, sections 1.2 and 2), it is
mentioned that following error codes are sent over the Attribute
Protocol.
1)Client Characteristic Configuration Descriptor Improperly Configured(0xFD)
2)Procedure Already in Progress(0xFE)
3)Out of Range(0xFF)

It should be treated as ATT Error codes. So, moved those to att-types.h
and handled org.bluez.Error.InProgress.

git repo link:
https://git.kernel.org/cgit/bluetooth/bluez.git/commit/?id=70489204d769568707d9a7607981c197e935391e

Change-Id: I17707fa3a6d5ed52ef6634cbe725ac0322a8292f