flow_dissector: Add support for HSRv0

Commit bf08824a ("flow_dissector: Add support for HSR") added support for
HSR within the flow dissector. However, it only works for HSR in version
1. Version 0 uses a different Ether Type. Add support for it.
Reported-by: Anthony Harivel <anthony.harivel@linutronix.de>
Signed-off-by: Kurt Kanzenbach <kurt@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/core/flow_dissector.c

@@ -1283,6 +1283,7 @@ bool __skb_flow_dissect(const struct net *net,
 		break;
 	}
 
+	case htons(ETH_P_PRP):
 	case htons(ETH_P_HSR): {
 		struct hsr_tag *hdr, _hdr;