fbdev: sh_mobile_lcdc: Remove board configuration board_data field

The field is unused, remove it. Update board code accordingly.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
diff --git a/arch/arm/mach-shmobile/board-mackerel.c b/arch/arm/mach-shmobile/board-mackerel.c
index f275a81..d366e78 100644
--- a/arch/arm/mach-shmobile/board-mackerel.c
+++ b/arch/arm/mach-shmobile/board-mackerel.c
@@ -351,14 +351,14 @@
 	},
 };
 
-static int mackerel_set_brightness(void *board_data, int brightness)
+static int mackerel_set_brightness(int brightness)
 {
 	gpio_set_value(GPIO_PORT31, brightness);
 
 	return 0;
 }
 
-static int mackerel_get_brightness(void *board_data)
+static int mackerel_get_brightness(void)
 {
 	return gpio_get_value(GPIO_PORT31);
 }