[PATCH] drm/exynos: Fix build breakage on !DRM_EXYNOS_FIMD

[Krzysztof Kozlowski]

Selecting CONFIG_FB_S3C disables CONFIG_DRM_EXYNOS_FIMD leading to build
error:

drivers/built-in.o: In function `exynos_dp_dpms':
binder.c:(.text+0xd6a840): undefined reference to `fimd_dp_clock_enable'
binder.c:(.text+0xd6ab54): undefined reference to `fimd_dp_clock_enable'

Signed-off-by: Krzysztof Kozlowski <k.kozlowski.k at gmail.com>
---
 drivers/gpu/drm/exynos/exynos_drm_fimd.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.h b/drivers/gpu/drm/exynos/exynos_drm_fimd.h
index b4fcaa568456..db67f3d9786d 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fimd.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.h
@@ -10,6 +10,10 @@
 #ifndef _EXYNOS_DRM_FIMD_H_
 #define _EXYNOS_DRM_FIMD_H_
 
+#ifdef CONFIG_DRM_EXYNOS_FIMD
 extern void fimd_dp_clock_enable(struct exynos_drm_crtc *crtc, bool enable);
+#else
+static inline void fimd_dp_clock_enable(struct exynos_drm_crtc *crtc, bool enable) {};
+#endif
 
 #endif /* _EXYNOS_DRM_FIMD_H_ */
-- 
2.1.4