From: Thierry Reding <treding@nvidia.com>

Add the linux/of.h include to make available the standard device tree
functions used by this file.

Signed-off-by: Thierry Reding <treding@nvidia.com>
---
 arch/powerpc/platforms/powermac/backlight.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/powerpc/platforms/powermac/backlight.c b/arch/powerpc/platforms/powermac/backlight.c
index 79741370c40c..9afb64723649 100644
--- a/arch/powerpc/platforms/powermac/backlight.c
+++ b/arch/powerpc/platforms/powermac/backlight.c
@@ -14,6 +14,7 @@
 #include <linux/pmu.h>
 #include <linux/atomic.h>
 #include <linux/export.h>
+#include <linux/of.h>
 #include <asm/backlight.h>
 
 #define OLD_BACKLIGHT_MAX 15
-- 
2.51.0