[PATCH] gma500: medfield: fix build without CONFIG_BACKLIGHT_CLASS_DEVICE

[Kirill A. Shutemov]

From: "Kirill A. Shutemov" <kirill.shute...@linux.intel.com>

drivers/built-in.o: In function `mdfld_dsi_connector_set_property':
mdfld_dsi_output.c:(.text+0x6e909): undefined reference to 
`mdfld_set_brightness'
make: *** [.tmp_vmlinux1] Error 1

Signed-off-by: Kirill A. Shutemov <kirill.shutemov at linux.intel.com>
---
 drivers/gpu/drm/gma500/mdfld_dsi_output.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/drivers/gpu/drm/gma500/mdfld_dsi_output.c 
b/drivers/gpu/drm/gma500/mdfld_dsi_output.c
index 4c2cb4a..5675d93 100644
--- a/drivers/gpu/drm/gma500/mdfld_dsi_output.c
+++ b/drivers/gpu/drm/gma500/mdfld_dsi_output.c
@@ -244,7 +244,6 @@ static int mdfld_dsi_connector_set_property(struct 
drm_connector *connector,
                                uint64_t value)
 {
        struct drm_encoder *encoder = connector->encoder;
-       struct backlight_device *psb_bd;

        if (!strcmp(property->name, "scaling mode") && encoder) {
                struct psb_intel_crtc *psb_crtc =
@@ -301,11 +300,15 @@ static int mdfld_dsi_connector_set_property(struct 
drm_connector *connector,
                                                                        value))
                        goto set_prop_error;
                else {
+#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
+                       struct backlight_device *psb_bd;
+
                        psb_bd = mdfld_get_backlight_device();
                        if (psb_bd) {
                                psb_bd->props.brightness = value;
                                mdfld_set_brightness(psb_bd);
                        }
+#endif
                }
        }
 set_prop_done:
-- 
1.7.9.1