bnxt_en: Re-enable SRIOV during resume.

If VFs are enabled, we need to re-configure them during resume because
firmware has been reset while resuming.  Otherwise, the VFs won't
work after resume.

Fixes: c16d4ee0 ("bnxt_en: Refactor logic to re-enable SRIOV after firmware reset detected.")
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>