bnxt_en: fix ternary sign extension bug in bnxt_show_temp()

The problem is that bnxt_show_temp() returns long but "rc" is an int
and "len" is a u32.  With ternary operations the type promotion is quite
tricky.  The negative "rc" is first promoted to u32 and then to long so
it ends up being a high positive value instead of a a negative as we
intended.

Fix this by removing the ternary.

Fixes: d69753f ("bnxt_en: return proper error codes in bnxt_show_temp")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Author: Dan Carpenter

drivers/net/ethernet/broadcom/bnxt/bnxt.c

@@ -9736,7 +9736,9 @@ static ssize_t bnxt_show_temp(struct device *dev,
 	if (!rc)
 		len = sprintf(buf, "%u\n", resp->temp * 1000); /* display millidegree */
 	mutex_unlock(&bp->hwrm_cmd_lock);
-	return rc ?: len;
+	if (rc)
+		return rc;
+	return len;
 }
 static SENSOR_DEVICE_ATTR(temp1_input, 0444, bnxt_show_temp, NULL, 0);