[patch] sata_mv: silence an uninitialized variable warning

[Dan Carpenter]

Gcc version 4.6.2-12 complains that if we can't find the "nr-ports"
property in of_property_read_u32_array() then "n_ports" is used
uninitialized.  Let's set it to zero in that case.

Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>

diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index ebd0d24..3d8d5c6 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -4026,7 +4026,8 @@ static int mv_platform_probe(struct platform_device *pdev)
 	struct ata_host *host;
 	struct mv_host_priv *hpriv;
 	struct resource *res;
-	int n_ports, rc;
+	int n_ports = 0;
+	int rc;
 
 	ata_print_version_once(&pdev->dev, DRV_VERSION);