drivers/block/sata_sil3114.c: Fix GCC 4.6 build warning

Fix:

sata_sil3114.c: In function 'scan_sata':
sata_sil3114.c:793:7: warning: array subscript is above array bounds [-Warray-bounds]
sata_sil3114.c:794:7: warning: array subscript is above array bounds [-Warray-bounds]
sata_sil3114.c:795:39: warning: array subscript is above array bounds [-Warray-bounds]
sata_sil3114.c:795:7: warning: array subscript is above array bounds [-Warray-bounds]
sata_sil3114.c:797:7: warning: array subscript is above array bounds [-Warray-bounds]
sata_sil3114.c:800:7: warning: array subscript is above array bounds [-Warray-bounds]
sata_sil3114.c:801:7: warning: array subscript is above array bounds [-Warray-bounds]
sata_sil3114.c:802:39: warning: array subscript is above array bounds [-Warray-bounds]
sata_sil3114.c:802:7: warning: array subscript is above array bounds [-Warray-bounds]
sata_sil3114.c:804:7: warning: array subscript is above array bounds [-Warray-bounds]

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/drivers/block/sata_sil3114.c b/drivers/block/sata_sil3114.c
index 1e60636..34fe038 100644
--- a/drivers/block/sata_sil3114.c
+++ b/drivers/block/sata_sil3114.c
@@ -782,6 +782,7 @@
 		    (iobase[5] + VND_TF2_CH0) | ATA_PCI_CTL_OFS;
 		port[0].ioaddr.bmdma_addr = iobase[5] + VND_BMDMA_CH0;
 		break;
+#if (CONFIG_SYS_SATA_MAX_DEVICE >= 1)
 	case 1:
 		port[1].port_no = 0;
 		port[1].ioaddr.cmd_addr = iobase[5] + VND_TF0_CH1;
@@ -789,6 +790,7 @@
 		    (iobase[5] + VND_TF2_CH1) | ATA_PCI_CTL_OFS;
 		port[1].ioaddr.bmdma_addr = iobase[5] + VND_BMDMA_CH1;
 		break;
+#elif (CONFIG_SYS_SATA_MAX_DEVICE >= 2)
 	case 2:
 		port[2].port_no = 0;
 		port[2].ioaddr.cmd_addr = iobase[5] + VND_TF0_CH2;
@@ -796,6 +798,7 @@
 		    (iobase[5] + VND_TF2_CH2) | ATA_PCI_CTL_OFS;
 		port[2].ioaddr.bmdma_addr = iobase[5] + VND_BMDMA_CH2;
 		break;
+#elif (CONFIG_SYS_SATA_MAX_DEVICE >= 3)
 	case 3:
 		port[3].port_no = 0;
 		port[3].ioaddr.cmd_addr = iobase[5] + VND_TF0_CH3;
@@ -803,6 +806,7 @@
 		    (iobase[5] + VND_TF2_CH3) | ATA_PCI_CTL_OFS;
 		port[3].ioaddr.bmdma_addr = iobase[5] + VND_BMDMA_CH3;
 		break;
+#endif
 	default:
 		printf ("Tried to scan unknown port: ata%d\n", dev);
 		return 1;