igbvf: Remove unneeded pm_qos* calls

Power Management Quality of Service is not supported or used by the VF
driver.

Signed-off-by: Greg Rose <gregory.v.rose@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>