rocker: add name field into WorldOps ale let world specify its name

Also use this in world_name getter function.
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
Signed-off-by: NJason Wang <jasowang@redhat.com>

hw/net/rocker/rocker_of_dpa.c

@@ -2614,6 +2614,7 @@ RockerOfDpaGroupList *qmp_query_rocker_of_dpa_groups(const char *name,
 }
 
 static WorldOps of_dpa_ops = {
+    .name = "ofdpa",
     .init = of_dpa_init,
     .uninit = of_dpa_uninit,
     .ig = of_dpa_ig,

hw/net/rocker/rocker_world.c

@@ -98,10 +98,5 @@ enum rocker_world_type world_type(World *world)
 
 const char *world_name(World *world)
 {
-    switch (world->type) {
-    case ROCKER_WORLD_TYPE_OF_DPA:
-        return "OF_DPA";
-    default:
-        return "unknown";
-    }
+    return world->ops->name;
 }

hw/net/rocker/rocker_world.h

@@ -33,6 +33,7 @@ typedef int (world_cmd)(World *world, DescInfo *info,
                         RockerTlv *cmd_info_tlv);
 
 typedef struct world_ops {
+    const char *name;
     world_init *init;
     world_uninit *uninit;
     world_ig *ig;