crypto: hisilicon/qm - set function with static

These functions 'hisi_qm_create_qp' and 'hisi_qm_set_vft' are not
used outside qm.c, so they are marked as static.

Signed-off-by: Weili Qian <qianweili@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>