drivers/net: Remove unnecessary returns from void function()s

This patch removes from drivers/net/ all the unnecessary
return; statements that precede the last closing brace of
void functions.

It does not remove the returns that are immediately
preceded by a label as gcc doesn't like that.

It also does not remove null void functions with return.

Done via:
$ grep -rP --include=*.[ch] -l "return;\n}" net/ | \
  xargs perl -i -e 'local $/ ; while (<>) { s/\n[ \t\n]+return;\n}/\n}/g; print; }'

with some cleanups by hand.

Compile tested x86 allmodconfig only.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/hamachi.c

@@ -859,7 +859,6 @@ static void mdio_write(struct net_device *dev, int phy_id, int location, int val
 	for (i = 10000; i >= 0; i--)
 		if ((readw(ioaddr + MII_Status) & 1) == 0)
 			break;
-	return;
 }
 
 
@@ -1225,8 +1224,6 @@ static void hamachi_init_ring(struct net_device *dev)
 	}
 	/* Mark the last entry of the ring */
 	hmp->tx_ring[TX_RING_SIZE-1].status_n_length |= cpu_to_le32(DescEndRing);
-
-	return;
 }