ARM: shmobile: kzm9g: Use of_machine_is_compatible()

The machine number is hardcoded to ~0 on DT-enabled machines, making
machine_is_*() always fail when support for more than one machine is
compiled into the kernel. Replace the machine_is_kzm9g() call with
of_machine_is_compatible("renesas,kzm9g").

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/mach-shmobile/board-kzm9g.c

@@ -623,7 +623,7 @@ static int __init as3711_enable_lcdc_backlight(void)
 		0x45, 0xf0,
 	};
 
-	if (!machine_is_kzm9g())
+	if (!of_machine_is_compatible("renesas,kzm9g"))
 		return 0;
 
 	if (!a)