sata: fix a bug in init_sata() for pci-sata card

Except the first loop, init_sata() should return 0 instead of 1
in the others.

This patch fix the issue of the 2nd sata port not workable on pci-sata card.

Signed-off-by: Pengbo Li <Pengbo.Li@freescale.com>

drivers/block/sata_sil.c

@@ -519,7 +519,7 @@ int init_sata(int dev)
 	u16 word;
 
 	if (init_done == 1 && dev < sata_info.maxport)
-		return 1;
+		return 0;
 
 	init_done = 1;