drm/vc4: vec: Remove empty mode_fixup

The mode_fixup hooks are deprecated, and the behaviour we implement is the
default one anyway. Let's remove it.
Reviewed-by: Noralf Trønnes <noralf@tronnes.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20220728-rpi-analog-tv-properties-v2-24-459522d653a7@cerno.tech

drivers/gpu/drm/vc4/vc4_vec.c

@@ -483,14 +483,6 @@ static void vc4_vec_encoder_enable(struct drm_encoder *encoder)
 	drm_dev_exit(idx);
 }
 
-
-static bool vc4_vec_encoder_mode_fixup(struct drm_encoder *encoder,
-				       const struct drm_display_mode *mode,
-				       struct drm_display_mode *adjusted_mode)
-{
-	return true;
-}
-
 static void vc4_vec_encoder_atomic_mode_set(struct drm_encoder *encoder,
 					struct drm_crtc_state *crtc_state,
 					struct drm_connector_state *conn_state)
@@ -518,7 +510,6 @@ static int vc4_vec_encoder_atomic_check(struct drm_encoder *encoder,
 static const struct drm_encoder_helper_funcs vc4_vec_encoder_helper_funcs = {
 	.disable = vc4_vec_encoder_disable,
 	.enable = vc4_vec_encoder_enable,
-	.mode_fixup = vc4_vec_encoder_mode_fixup,
 	.atomic_check = vc4_vec_encoder_atomic_check,
 	.atomic_mode_set = vc4_vec_encoder_atomic_mode_set,
 };