Revert "crypto: caam/jr - Remove extra memory barrier during job ring dequeue"

This reverts commit bbfcac5f.

It caused a crash regression on powerpc:

https://lore.kernel.org/linux-crypto/87pnp2aflz.fsf@concordia.ellerman.id.au/



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