crypto: hisilicon/qm - fix the uacce mmap failed

Allocate an extra memory page for qp. This extra page is
used to set the device or qp status. But this page not
be used currently. Meanwhile it leads to dus size not equal
to mmap size as using uacce sva mode, and cause the app task
broken.

Signed-off-by: Kai Ye <yekai13@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>