serial: altera: Make of_device_id arrays const

Make the of_device_id arrays const, as it is handled as const by all OF
functions.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/tty/serial/altera_jtaguart.c b/drivers/tty/serial/altera_jtaguart.c
index d22e3d9..932e019 100644
--- a/drivers/tty/serial/altera_jtaguart.c
+++ b/drivers/tty/serial/altera_jtaguart.c
@@ -462,7 +462,7 @@
 }
 
 #ifdef CONFIG_OF
-static struct of_device_id altera_jtaguart_match[] = {
+static const struct of_device_id altera_jtaguart_match[] = {
 	{ .compatible = "ALTR,juart-1.0", },
 	{ .compatible = "altr,juart-1.0", },
 	{},
diff --git a/drivers/tty/serial/altera_uart.c b/drivers/tty/serial/altera_uart.c
index 6a24323..1cb2cdb 100644
--- a/drivers/tty/serial/altera_uart.c
+++ b/drivers/tty/serial/altera_uart.c
@@ -610,7 +610,7 @@
 }
 
 #ifdef CONFIG_OF
-static struct of_device_id altera_uart_match[] = {
+static const struct of_device_id altera_uart_match[] = {
 	{ .compatible = "ALTR,uart-1.0", },
 	{ .compatible = "altr,uart-1.0", },
 	{},