crypto: serpent-sse2 - remove dead code from serpent_sse2_glue.c::serpent_sse2_init()

We cannot reach the line after 'return err'. Remove it.

Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>