drm/exynos: exynos_drm.h header file fixes

First of all #ifdef __KERNEL__ was added to exynos_drm.h to
mark the part that should be left out of userspace.
Secondly exynos_drm.h was added to include/drm/Kbuild, so it
will be included when doing make headers_install.

Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
diff --git a/include/drm/Kbuild b/include/drm/Kbuild
index a5c0e10..1e38a19 100644
--- a/include/drm/Kbuild
+++ b/include/drm/Kbuild
@@ -2,6 +2,7 @@
 header-y += drm_fourcc.h
 header-y += drm_mode.h
 header-y += drm_sarea.h
+header-y += exynos_drm.h
 header-y += i810_drm.h
 header-y += i915_drm.h
 header-y += mga_drm.h
diff --git a/include/drm/exynos_drm.h b/include/drm/exynos_drm.h
index 308575e..1ed3aae 100644
--- a/include/drm/exynos_drm.h
+++ b/include/drm/exynos_drm.h
@@ -97,6 +97,8 @@
 #define DRM_IOCTL_EXYNOS_PLANE_SET_ZPOS	DRM_IOWR(DRM_COMMAND_BASE + \
 		DRM_EXYNOS_PLANE_SET_ZPOS, struct drm_exynos_plane_set_zpos)
 
+#ifdef __KERNEL__
+
 /**
  * A structure for lcd panel information.
  *
@@ -152,4 +154,5 @@
 	unsigned int			bpp;
 };
 
-#endif
+#endif	/* __KERNEL__ */
+#endif	/* _EXYNOS_DRM_H_ */