drivers/video/backlight/aat2870_bl.c: make it buildable as a module

i386 allmodconfig:

  drivers/built-in.o: In function `aat2870_bl_remove':
  aat2870_bl.c:(.text+0x414f9): undefined reference to `backlight_device_unregister'
  drivers/built-in.o: In function `aat2870_bl_probe':
  aat2870_bl.c:(.text+0x418fc): undefined reference to `backlight_device_register'
  aat2870_bl.c:(.text+0x41a31): undefined reference to `backlight_device_unregiste

Cc: Jin Park <jinyoungp@nvidia.com>
Cc: Samuel Ortiz <sameo@linux.intel.com>
Cc: Axel Lin <axel.lin@gmail.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig
index 69407e72aac1a9291d2ceb3dec812da2063cf94b..278aeaa925059673fdcefa7b1c243f5a92b41837 100644 (file)
--- a/drivers/video/backlight/Kconfig
+++ b/drivers/video/backlight/Kconfig
@@ -336,7 +336,7 @@ config BACKLIGHT_PCF50633
          enable its driver.
 
 config BACKLIGHT_AAT2870
-       bool "AnalogicTech AAT2870 Backlight"
+       tristate "AnalogicTech AAT2870 Backlight"
        depends on BACKLIGHT_CLASS_DEVICE && MFD_AAT2870_CORE
        help
          If you have a AnalogicTech AAT2870 say Y to enable the