Don't call snd_jack_report at release of sigmatel and conexnat codecs
which results in Oops at unloading the module.

The Oops is triggered by the power-up sequence during the free due to
the pincfg restoration.  Since the power-up sequence is involved with
the unsol handling, the jack reporting may be issued during that.
The Oops occurs with this jack reporting because the jack instances
have been already released but the codec doesn't do the proper
book-keeping.

This patch adds the book-keeping of jack instances to avoid the access
to bogus pointers.
Signed-off-by: Takashi Iwai <tiwai@suse.de>