ixgbe: clear all queues on VF reset

ixgbe devices support up to 8 Rx and Tx queues per virtual function.
Currently, the registers of only seven queues are set to default when
resetting a VF.

Signed-off-by: Simon Ellmann <simon.ellmann@tum.de>
Acked-by: Haiyue Wang <haiyue.wang@intel.com>

Approved by: imp
Obtained from: DPDK (d2565b347915def3a0f3c68bde6824acf096a0e6)
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D31621

(cherry picked from commit 7165504a17682dc8c96d44c65319bf73c89f7f10)