ixgbe: fix incorrect status check

ixgbe: fix incorrect status check

Check for ret_val instead of !ret_val to allow the rest of
the code to execute and configure the speed properly.

Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com>
Tested-by: Krishneil Singh <krishneil.k.singh@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Orabug: 26242766
(cherry picked from commit d9c23ff80b9fdc1f2e8efeb5368adfd93493d7b4)
Signed-off-by: Jack Vogel <jack.vogel@oracle.com>
Reviewed-by: Ethan Zhao <ethan.zhao@oracle.com>