net/ixgbe: fix too many interrupts

net/ixgbe: fix too many interrupts

To support kernel VF, PBA bit is always set. But it may
cause the too many interrupts issue on specific Linux
kernel versions, e.g. 4.4.0-116.
PF host should set the auto clean, mask and throttling
as we always set the register for kernel VF.

Fixes: 6b75183ac4d0 ("net/ixgbe: fix wrong PBA setting")
Cc: stable@dpdk.org
Signed-off-by: Michael Luo <michael.luo@intel.com>
Signed-off-by: Wenzhuo Lu <wenzhuo.lu@intel.com>
Reviewed-by: Qi Zhang <qi.z.zhang@intel.com>