bonding: use table for mode names

Use a small array in bond_mode_name() for the names, thus saving some
space:

before

    text     data      bss      dec    hex filename
   57736     9372      344    67452  1077c drivers/net/bonding/bonding.ko

after
    text     data      bss      dec    hex filename
   57441     9372      344    67157  10655 drivers/net/bonding/bonding.ko
Signed-off-by: NHolger Eitzenberger <holger@eitzenberger.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/bonding/bond_main.c

@@ -219,24 +219,20 @@ static void bond_deinit(struct net_device *bond_dev);
 
 static const char *bond_mode_name(int mode)
 {
-	switch (mode) {
-	case BOND_MODE_ROUNDROBIN :
-		return "load balancing (round-robin)";
-	case BOND_MODE_ACTIVEBACKUP :
-		return "fault-tolerance (active-backup)";
-	case BOND_MODE_XOR :
-		return "load balancing (xor)";
-	case BOND_MODE_BROADCAST :
-		return "fault-tolerance (broadcast)";
-	case BOND_MODE_8023AD:
-		return "IEEE 802.3ad Dynamic link aggregation";
-	case BOND_MODE_TLB:
-		return "transmit load balancing";
-	case BOND_MODE_ALB:
-		return "adaptive load balancing";
-	default:
+	static const char *names[] = {
+		[BOND_MODE_ROUNDROBIN] = "load balancing (round-robin)",
+		[BOND_MODE_ACTIVEBACKUP] = "fault-tolerance (active-backup)",
+		[BOND_MODE_XOR] = "load balancing (xor)",
+		[BOND_MODE_BROADCAST] = "fault-tolerance (broadcast)",
+		[BOND_MODE_8023AD]= "IEEE 802.3ad Dynamic link aggregation",
+		[BOND_MODE_TLB] = "transmit load balancing",
+		[BOND_MODE_ALB] = "adaptive load balancing",
+	};
+
+	if (mode < 0 || mode > BOND_MODE_ALB)
 		return "unknown";
-	}
+
+	return names[mode];
 }
 
 /*---------------------------------- VLAN -----------------------------------*/