MIPS: Alchemy: Constify gpio_led

gpio_leds are not supposed to change at runtime. struct
gpio_led_platform_data contains a const struct gpio_led pointer since
v2.6.39, so mark the gpio_led structures const too.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/18006/
[jhogan@kernel.org: improve commit message]
Signed-off-by: James Hogan <jhogan@kernel.org>

arch/mips/alchemy/board-gpr.c

@@ -190,7 +190,7 @@ static struct platform_device gpr_mtd_device = {
 /*
  * LEDs
  */
-static struct gpio_led gpr_gpio_leds[] = {
+static const struct gpio_led gpr_gpio_leds[] = {
 	{	/* green */
 		.name			= "gpr:green",
 		.gpio			= 4,

arch/mips/alchemy/board-mtx1.c

@@ -145,7 +145,7 @@ static struct platform_device mtx1_wdt = {
 	.resource = mtx1_wdt_res,
 };
 
-static struct gpio_led default_leds[] = {
+static const struct gpio_led default_leds[] = {
 	{
 		.name	= "mtx1:green",
 		.gpio = 211,