hinic: fix a bug of setting hw_ioctxt

[ Upstream commit d2ed69ce9ed3477e2a9527e6b89fe4689d99510e ]

a reserved field is used to signify prime physical function index
in the latest firmware version, so we must assign a value to it
correctly

Signed-off-by: Luo bin <luobin9@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>