From 7a26f9ad1b5badfd0200ce2262ad696e2a6b7fbb Mon Sep 17 00:00:00 2001
From: "Nathan-J. Hirschauer" <nathanhi@deepserve.info>
Date: Wed, 18 Feb 2015 02:01:19 +0100
Subject: [PATCH] drm/radeon: enable native backlight control on old macs

Commit b7bc596ebbe0 ("drm/radeon: disable native
backlight control on pre-r6xx asics (v2)") accidently
broke backlight control on old mac laptops that use the
on-GPU backlight controller.

Signed-off-by: Nathan-J. Hirschauer <nathanhi@deepserve.info>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
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