staging: unisys: visorbus: visorchipset.c: Fix SonarQube sprintf findings

Fixes two sprintf invocations where we attempt to format an unsigned
integer as a signed integer.
Signed-off-by: David Binder <david.binder@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/unisys/visorbus/visorchipset.c

@@ -210,7 +210,7 @@ static ssize_t error_show(struct device *dev, struct device_attribute *attr,
 				&error, sizeof(u32));
 	if (err)
 		return err;
-	return sprintf(buf, "%i\n", error);
+	return sprintf(buf, "%u\n", error);
 }
 
 static ssize_t error_store(struct device *dev, struct device_attribute *attr,
@@ -245,7 +245,7 @@ static ssize_t textid_show(struct device *dev, struct device_attribute *attr,
 	if (err)
 		return err;
 
-	return sprintf(buf, "%i\n", text_id);
+	return sprintf(buf, "%u\n", text_id);
 }
 
 static ssize_t textid_store(struct device *dev, struct device_attribute *attr,