[patch] gma500: silence an unused variable warning

[Alan Cox]

On Thu, 10 May 2012 10:33:02 +0300
Dan Carpenter <dan.carpenter at oracle.com> wrote:

> If CONFIG_BACKLIGHT_CLASS_DEVICE is disabled then GCC warns that:
> 	drivers/gpu/drm/gma500/opregion.c:154:6: warning:
> 		unused variable ‘max’ [-Wunused-variable]
> 
> Which give me a chance to use the new config_enabled() macro.  :)
> 
> Signed-off-by: Dan Carpenter <dan.carpenter at oracle.com>

Acked-by: Alan Cox <alan at linux.intel.com>