[ARM] corgi_lcd: use GPIO API for BACKLIGHT_ON and BACKLIGHT_CONT

Signed-off-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

include/linux/spi/corgi_lcd.h

@@ -10,6 +10,9 @@ struct corgi_lcd_platform_data {
 	int	default_intensity;
 	int	limit_mask;
 
+	int	gpio_backlight_on;	/* -1 if n/a */
+	int	gpio_backlight_cont;	/* -1 if n/a */
+
 	void (*notify)(int intensity);
 	void (*kick_battery)(void);
 };