net/fm10k: fix promiscuous receive for VF

net/fm10k: fix promiscuous receive for VF

When app tries to change promisc/allmulti setting, fm10k will check if a
valid glort is acquired, and exit without doing anything if not.

For VFs, this glort value is not necessary, and so the check can be
removed. This saves having unnecessary failures of the API call, as well as
saving the time taken for the mailbox communication between VF and PF in
the case when the glort check passes.

Fixes: df02ba864695 ("fm10k: support promiscuous mode")

Signed-off-by: Wang Xiao W <xiao.w.wang@intel.com>
Acked-by: Jing Chen <jing.d.chen@intel.com>