chan_motif: Release format capabilities and config on module load error

ASTERISK-24384 #close
Reported by: Corey Farrell
Review: https://reviewboard.asterisk.org/r/4043/
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Merged revisions 424550 from http://svn.asterisk.org/svn/asterisk/branches/11


git-svn-id: http://svn.asterisk.org/svn/asterisk/branches/12@424551 f38db490-d61c-443f-a65b-d21fe96a405b