e1000e: rename e1000e_config_collision_dist() and call as function pointer

Rename e1000e_config_collision_dist() to
e1000e_config_collision_dist_generic() to signify the function is used for
more than one MAC-family type, and set and use it as a MAC ops function
pointer to be consistent with the driver design.

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/hw.h b/drivers/net/ethernet/intel/e1000e/hw.h
index 197059b..50e114b 100644
--- a/drivers/net/ethernet/intel/e1000e/hw.h
+++ b/drivers/net/ethernet/intel/e1000e/hw.h
@@ -781,6 +781,7 @@
 	s32  (*setup_physical_interface)(struct e1000_hw *);
 	s32  (*setup_led)(struct e1000_hw *);
 	void (*write_vfta)(struct e1000_hw *, u32, u32);
+	void (*config_collision_dist)(struct e1000_hw *);
 	s32  (*read_mac_addr)(struct e1000_hw *);
 };