net/iavf: fix VF reset for RSS

net/iavf: fix VF reset for RSS

Since there are some default rss configure in kernel PF/VF but not DPDK
IAVF, if these configurations be modified by VF and then VF reset, this
default rss configurations can not be reset to default by IAVF. So need
to add default rss set in IAVF hash initial process.

Fixes: 7be10c3004be ("net/iavf: add RSS configuration for VF")
Cc: stable@dpdk.org
Signed-off-by: Jeff Guo <jia.guo@intel.com>
Acked-by: Qi Zhang <qi.z.zhang@intel.com>
Tested-by: Zhiwei He <zhiwei.he@intel.com>