openvswitch: Add recirc_id to recirc warning

When hitting the recirculation limit, the kernel would currently log
something like this:

[ 58.586597] openvswitch: ovs-system: deferred action limit reached, drop recirc action

Which isn't all that useful to debug as we only have the interface name
to go on but can't track it down to a specific flow.

With this change, we now instead get:

[ 58.586597] openvswitch: ovs-system: deferred action limit reached, drop recirc action (recirc_id=0x9e)

Which can now be correlated with the flow entries from OVS.

Suggested-by: Frode Nordahl <[e-mail]>
Signed-off-by: Stéphane Graber <[e-mail]>
Tested-by: Stephane Graber <[e-mail]>
Acked-by: Eelco Chaudron <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

net/openvswitch/actions.c

···
 				pr_warn("%s: deferred action limit reached, drop sample action\n",
 					ovs_dp_name(dp));
 			} else {  /* Recirc action */
-				pr_warn("%s: deferred action limit reached, drop recirc action\n",
-					ovs_dp_name(dp));
+				pr_warn("%s: deferred action limit reached, drop recirc action (recirc_id=%#x)\n",
+					ovs_dp_name(dp), recirc_id);
 			}
 		}
 	}