MAINTAINERS: update SEC2/HPRE driver maintainers list

Kai Ye is no longer participates in the Linux community.
Zhiqi Song will be responsible for the code maintenance of the
HPRE module.
Therefore, the maintainers list needs to be updated.

Signed-off-by: Longfang Liu <liulongfang@huawei.com>
Reviewed-by: Zhiqi Song <songzhiqi1@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>