net: openvswitch: use u64 for meter bucket

When setting the meter rate to 4+Gbps, there is an
overflow, the meters don't work as expected.

Cc: Pravin B Shelar <pshelar@ovn.org>
Cc: Andy Zhou <azhou@ovn.org>
Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com>
Acked-by: Pravin B Shelar <pshelar@ovn.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/openvswitch/meter.h b/net/openvswitch/meter.h
index 61a3ca4..0c33889 100644
--- a/net/openvswitch/meter.h
+++ b/net/openvswitch/meter.h
@@ -26,7 +26,7 @@ struct dp_meter_band {
 	u32 type;
 	u32 rate;
 	u32 burst_size;
-	u32 bucket; /* 1/1000 packets, or in bits */
+	u64 bucket; /* 1/1000 packets, or in bits */
 	struct ovs_flow_stats stats;
 };