drm/exynos: move to_exynos_crtc() macro to main header

With this change we allow other pieces of the code to use this macro.
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

drivers/gpu/drm/exynos/exynos_drm_crtc.c

@@ -20,9 +20,6 @@
 #include "exynos_drm_encoder.h"
 #include "exynos_drm_plane.h"
 
-#define to_exynos_crtc(x)	container_of(x, struct exynos_drm_crtc,\
-				drm_crtc)
-
 enum exynos_crtc_mode {
 	CRTC_MODE_NORMAL,	/* normal mode */
 	CRTC_MODE_BLANK,	/* The private plane of crtc is blank */

drivers/gpu/drm/exynos/exynos_drm_drv.h

@@ -23,6 +23,9 @@
 #define MAX_FB_BUFFER	4
 #define DEFAULT_ZPOS	-1
 
+#define to_exynos_crtc(x)	container_of(x, struct exynos_drm_crtc,\
+				drm_crtc)
+
 /* This enumerates device type. */
 enum exynos_drm_device_type {
 	EXYNOS_DEVICE_TYPE_NONE,