net/iavf: negotiate large VF and request more queues

net/iavf: negotiate large VF and request more queues

Negotiate large VF capability with PF during VF initialization. If large
VF is supported and the number of queues larger than 16 is required, VF
requests additional queues from PF. Mark the state that large VF is
supported.

If the allocated queues number is larger than 16, the max RSS queue
region cannot be 16 anymore. Add the function to query max RSS queue
region from PF, use it in the RSS initialization and future filters
configuration.

Signed-off-by: Ting Xu <ting.xu@intel.com>
Acked-by: Beilei Xing <beilei.xing@intel.com>