qeth: Convert ethtool get_stats_count() ops to get_sset_count()

This string query operation was supposed to be replaced by the
generic get_sset_count() starting in 2007.  Convert qeth's
implementation.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index c4a42d9..edee4dc 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -4305,11 +4305,16 @@
 	{"tx csum"},
 };
 
-int qeth_core_get_stats_count(struct net_device *dev)
+int qeth_core_get_sset_count(struct net_device *dev, int stringset)
 {
-	return (sizeof(qeth_ethtool_stats_keys) / ETH_GSTRING_LEN);
+	switch (stringset) {
+	case ETH_SS_STATS:
+		return (sizeof(qeth_ethtool_stats_keys) / ETH_GSTRING_LEN);
+	default:
+		return -EINVAL;
+	}
 }
-EXPORT_SYMBOL_GPL(qeth_core_get_stats_count);
+EXPORT_SYMBOL_GPL(qeth_core_get_sset_count);
 
 void qeth_core_get_ethtool_stats(struct net_device *dev,
 		struct ethtool_stats *stats, u64 *data)