ipv4: fix 32b build

Address remaining issue after 80ec192.

Signed-off-by: Madalin Bucur <madalin.bucur@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index c2d0ebc..96773a2 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -1496,7 +1496,7 @@
 	int cpu;
 
 	for_each_possible_cpu(cpu) {
-		res += snmp_get_cpu_field(mib, cpu, offt, syncp_offset);
+		res += snmp_get_cpu_field64(mib, cpu, offt, syncp_offset);
 	}
 	return res;
 }