drm/nouveau: fix incorrect FB_BACKLIGHT usage in Kconfig

Making FB_BACKLIGHT tristate by commit b4a1ed0cd18b ("fbdev:
make FB_BACKLIGHT a tristate") caused unmet dependencies in
some configurations:

WARNING: unmet direct dependencies detected for FB_BACKLIGHT
  Depends on [m]: HAS_IOMEM [=y] && FB [=m]
  Selected by [y]:
  - DRM_NOUVEAU [=y] && HAS_IOMEM [=y] && DRM [=y] && PCI [=y] && MMU [=y] && DRM_NOUVEAU_BACKLIGHT [=y]
  Selected by [m]:
  - FB_NVIDIA [=m] && HAS_IOMEM [=y] && FB [=m] && PCI [=y] && FB_NVIDIA_BACKLIGHT [=y]

Fix it by making DRM_NOUVEAU select BACKLIGHT_CLASS_DEVICE and
BACKLIGHT_LCD_SUPPORT instead of FB_BACKLIGHT.

Fixes: b4a1ed0cd18b ("fbdev: make FB_BACKLIGHT a tristate")
Reported-by: Randy Dunlap <[email protected]>
Acked-by: Randy Dunlap <[email protected]> # build-tested
Cc: Rob Clark <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Cc: Ben Skeggs <[email protected]>
Cc: David Airlie <[email protected]>
Cc: Daniel Vetter <[email protected]>
Cc: Stephen Rothwell <[email protected]>
Signed-off-by: Bartlomiej Zolnierkiewicz <[email protected]>

0 files changed, 0 insertions, 0 deletions