drm/nouveau: Do not include <drm/drm_fb_helper.h>

Including <drm/drm_fb_helper.h> is not required, so remove the include
statement. No functional changes.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20230111130206.29974-9-tzimmermann@suse.de

drivers/gpu/drm/nouveau/dispnv04/crtc.c

@@ -23,7 +23,6 @@
  * DEALINGS IN THE SOFTWARE.
  */
 #include <drm/drm_crtc_helper.h>
-#include <drm/drm_fb_helper.h>
 #include <drm/drm_fourcc.h>
 #include <drm/drm_plane_helper.h>
 #include <drm/drm_vblank.h>

drivers/gpu/drm/nouveau/nouveau_drm.c

@@ -33,7 +33,6 @@
 #include <drm/drm_aperture.h>
 #include <drm/drm_crtc_helper.h>
 #include <drm/drm_drv.h>
-#include <drm/drm_fb_helper.h>
 #include <drm/drm_fbdev_generic.h>
 #include <drm/drm_gem_ttm_helper.h>
 #include <drm/drm_ioctl.h>