crypto: sun8i-ss - Fix a test in sun8i_ss_setup_ivs()

SS_ENCRYPTION is (0 << 7 = 0), so the test can never be true.
Use a direct comparison to SS_ENCRYPTION instead.

The same king of test is already done the same way in sun8i_ss_run_task().

Fixes: 359e893e ("crypto: sun8i-ss - rework handling of IV")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>