Update info on VLAN support in hardware:

- bce(4) and cxgb(4) can do hardware acceleration;
- fwe(4) and nfe(4) can handle long frames.

share/man/man4/vlan.4

@@ -122,7 +122,9 @@ The whole issue is very specific to a particular device and its driver.
 .Pp
 By now, the list of physical interfaces able of full VLAN processing
 in the hardware is limited to the following devices:
+.Xr bce 4 ,
 .Xr bge 4 ,
+.Xr cxgb 4 ,
 .Xr em 4 ,
 .Xr ixgb 4 ,
 .Xr msk 4 ,
@@ -156,10 +158,12 @@ The following interfaces support long frames for
 natively:
 .Xr bfe 4 ,
 .Xr dc 4 ,
+.Xr fwe 4 ,
 .Xr fxp 4 ,
 .Xr gem 4 ,
 .Xr hme 4 ,
 .Xr le 4 ,
+.Xr nfe 4 ,
 .Xr rl 4 ,
 .Xr sis 4 ,
 .Xr sk 4 ,