e1000e: cleanup use of check_mng_mode function pointer

Replace e1000_check_mng_mode() inline function with calls to the MAC ops
check_mng_mode function pointer.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
diff --git a/drivers/net/ethernet/intel/e1000e/manage.c b/drivers/net/ethernet/intel/e1000e/manage.c
index 0d24b13..473f8e7 100644
--- a/drivers/net/ethernet/intel/e1000e/manage.c
+++ b/drivers/net/ethernet/intel/e1000e/manage.c
@@ -106,7 +106,7 @@
 }
 
 /**
- *  e1000e_check_mng_mode_generic - check management mode
+ *  e1000e_check_mng_mode_generic - Generic check management mode
  *  @hw: pointer to the HW structure
  *
  *  Reads the firmware semaphore register and returns true (>0) if
@@ -138,7 +138,7 @@
 	hw->mac.tx_pkt_filtering = true;
 
 	/* No manageability, no filtering */
-	if (!e1000e_check_mng_mode(hw)) {
+	if (!hw->mac.ops.check_mng_mode(hw)) {
 		hw->mac.tx_pkt_filtering = false;
 		return hw->mac.tx_pkt_filtering;
 	}