This patch creates new set of common rss init APIs for PF and VF rss
module. Subfunctions called by rss init process are also created include
rss tuple configuration and rss indirect table configuration.

These new common rss init APIs will be used to replace the old PF and VF
rss init APIs in next patches.

Signed-off-by: Jie Wang <wangjie125@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>