Sync some patchs from upstreaming about add FDIR VLAN match
mode runtime config and fix doc format for hns3 pmd. Patchs
are as follow:
- doc: unify sections of networking drivers guide
- net/hns3: delete duplicate macro definition
- net/hns3: add FDIR VLAN match mode runtime config
- doc: fix kernel patch link in hns3 guide
- doc: fix syntax in hns3 guide
- doc: fix number of leading spaces in hns3 guide
