serial: sunplus-uart: change sunplus_console_ports from global to static

Smatch reports this issue
sunplus-uart.c:501:26: warning: symbol 'sunplus_console_ports' was not declared. Should it be static?

sunplus_console_ports is only used in sunplus-uart.c so change
its storage-class specifier to static
Reviewed-by: Jiri Slaby <jirislaby@kernel.org>
Signed-off-by: Tom Rix <trix@redhat.com>
Link: https://lore.kernel.org/r/20220421152505.1531507-1-trix@redhat.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/sunplus-uart.c

@@ -498,7 +498,7 @@ static const struct uart_ops sunplus_uart_ops = {
 };
 
 #ifdef CONFIG_SERIAL_SUNPLUS_CONSOLE
-struct sunplus_uart_port *sunplus_console_ports[SUP_UART_NR];
+static struct sunplus_uart_port *sunplus_console_ports[SUP_UART_NR];
 
 static void sunplus_uart_console_putchar(struct uart_port *port,
 					 unsigned char ch)