The error handling path of 'chcr_authenc_setkey()' is the same as this
error handling code.

So just 'goto out' as done everywhere in the function to simplify the code.
Signed-off-by: NChristophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>