i2c: Use snprintf to set adapter names

Use snprintf instead of sprintf to set adapter names, it's safer.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
diff --git a/drivers/i2c/busses/i2c-at91.c b/drivers/i2c/busses/i2c-at91.c
index 9efb021..67d9dc5 100644
--- a/drivers/i2c/busses/i2c-at91.c
+++ b/drivers/i2c/busses/i2c-at91.c
@@ -222,7 +222,7 @@
 		rc = -ENOMEM;
 		goto fail2;
 	}
-	sprintf(adapter->name, "AT91");
+	snprintf(adapter->name, sizeof(adapter->name), "AT91");
 	adapter->algo = &at91_algorithm;
 	adapter->class = I2C_CLASS_HWMON;
 	adapter->dev.parent = &pdev->dev;