iwlwifi: dbg_ini: support debug info TLV

Add support to debug info TLV.
The TLV contains human readable naming of the FW image and the
debug configuration.

Signed-off-by: Shahar S Matityahu <shahar.s.matityahu@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>