drm/fsl-dcu: remove separate compilation unit for fbdev emulation

The separate file fsl_dcu_drm_fbdev.c only initialized fbdev
emulation which is a one-line operation. There is not much more
code on sight which justifies a separate file, hence call the
initialization helper directly from the drv file.
Signed-off-by: Stefan Agner <stefan@agner.ch>

drivers/gpu/drm/fsl-dcu/Makefile

@@ -3,6 +3,5 @@ fsl-dcu-drm-y := fsl_dcu_drm_drv.o \
 		 fsl_dcu_drm_rgb.o \
 		 fsl_dcu_drm_plane.o \
 		 fsl_dcu_drm_crtc.o \
-		 fsl_dcu_drm_fbdev.o \
 		 fsl_tcon.o
 obj-$(CONFIG_DRM_FSL_DCU)	+= fsl-dcu-drm.o

drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c

@@ -87,7 +87,7 @@ static int fsl_dcu_load(struct drm_device *dev, unsigned long flags)
 		goto done;
 	dev->irq_enabled = true;
 
-	fsl_dcu_fbdev_init(dev);
+	fsl_dev->fbdev = drm_fbdev_cma_init(dev, 24, 1, 1);
 
 	return 0;
 done:

drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.h

@@ -197,7 +197,6 @@ struct fsl_dcu_drm_device {
 	struct drm_atomic_state *state;
 };
 
-void fsl_dcu_fbdev_init(struct drm_device *dev);
 int fsl_dcu_drm_modeset_init(struct fsl_dcu_drm_device *fsl_dev);
 
 #endif /* __FSL_DCU_DRM_DRV_H__ */

drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_fbdev.c

-/*
- * Copyright 2015 Freescale Semiconductor, Inc.
- *
- * Freescale DCU drm device driver
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#include <drm/drmP.h>
-#include <drm/drm_fb_cma_helper.h>
-
-#include "fsl_dcu_drm_drv.h"
-
-/* initialize fbdev helper */
-void fsl_dcu_fbdev_init(struct drm_device *dev)
-{
-	struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev->dev);
-
-	fsl_dev->fbdev = drm_fbdev_cma_init(dev, 24, 1, 1);
-}