serial: 8250: Add an empty line and remove some useless {}

This fixes the following checkpatch.pl warnings:
   WARNING: Missing a blank line after declarations
   WARNING: braces {} are not necessary for any arm of this statement
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/257ffd691b4a062ad017333c9430d69da6dbd29a.1619594713.git.christophe.jaillet@wanadoo.frSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/8250/8250_core.c

@@ -321,9 +321,9 @@ static int univ8250_setup_irq(struct uart_8250_port *up)
 	 * hardware interrupt, we use a timer-based system.  The original
 	 * driver used to do this with IRQ0.
 	 */
-	if (!port->irq) {
+	if (!port->irq)
 		mod_timer(&up->timer, jiffies + uart_poll_timeout(port));
-	} else
+	else
 		retval = serial_link_irq_chain(up);
 
 	return retval;
@@ -752,6 +752,7 @@ void serial8250_suspend_port(int line)
 	if (!console_suspend_enabled && uart_console(port) &&
 	    port->type != PORT_8250) {
 		unsigned char canary = 0xa5;
+
 		serial_out(up, UART_SCR, canary);
 		if (serial_in(up, UART_SCR) == canary)
 			up->canary = canary;