Fix the coccicheck warnings:

./drivers/scsi/scsi_transport_sas.c:525:9-17: WARNING: use scnprintf or 
sprintf
./drivers/scsi/scsi_transport_sas.c:572:8-16: WARNING: use scnprintf or 
sprintf
./drivers/scsi/scsi_transport_sas.c:1180:9-17: WARNING: use scnprintf or 
sprintf

Signed-off-by: ztt <1549089851@qq.com>
---
  drivers/scsi/scsi_transport_sas.c | 6 +++---
  1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/scsi/scsi_transport_sas.c 
b/drivers/scsi/scsi_transport_sas.c
index d704c484a251..bbbe6ff28b34 100644
--- a/drivers/scsi/scsi_transport_sas.c
+++ b/drivers/scsi/scsi_transport_sas.c
@@ -522,7 +522,7 @@ show_sas_device_type(struct device *dev,
      struct sas_phy *phy = transport_class_to_phy(dev);

      if (!phy->identify.device_type)
-        return snprintf(buf, 20, "none\n");
+        return scnprintf(buf, 20, "none\n");
      return get_sas_device_type_names(phy->identify.device_type, buf);
  }
  static DEVICE_ATTR(device_type, S_IRUGO, show_sas_device_type, NULL);
@@ -569,7 +569,7 @@ show_sas_phy_enable(struct device *dev, struct 
device_attribute *attr,
  {
      struct sas_phy *phy = transport_class_to_phy(dev);

-    return snprintf(buf, 20, "%d\n", phy->enabled);
+    return scnprintf(buf, 20, "%d\n", phy->enabled);
  }

  static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, show_sas_phy_enable,
@@ -1177,7 +1177,7 @@ show_sas_rphy_device_type(struct device *dev,
      struct sas_rphy *rphy = transport_class_to_rphy(dev);

      if (!rphy->identify.device_type)
-        return snprintf(buf, 20, "none\n");
+        return scnprintf(buf, 20, "none\n");
      return get_sas_device_type_names(
              rphy->identify.device_type, buf);
  }