a_reset: cleanup + remove dead code

The function a_reset_free() is not used anywhere at the code. The
reason for this is that a BSC instance is never cleared once it
is started up. Also the timer number is not according to the spec.

- Remove a_reset_free()
- Fix timer identification number (T4)
- use fi->priv to hold context info
- Fix sourcecode formatting

Change-Id: I72095d52304c520e383755eee6c889bce492cbd4
Related: OS#3102
7 files changed