crypto: aspeed - Fix hash fallback path typo

Fix typo in the fallback code path.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202506231830.us4hiwlZ-lkp@intel.com/


Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>