drm/i915: Pass intel_atomic_state to cdclk funcs

Pass around intel_atomic_state rather than drm_atomic_state.
This avoids some extra casts and annoing aliasing variables.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190517193132.8140-1-ville.syrjala@linux.intel.comReviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>

drivers/gpu/drm/i915/i915_drv.h

@@ -295,7 +295,7 @@ struct drm_i915_display_funcs {
 				    struct intel_crtc_state *cstate);
 	int (*compute_global_watermarks)(struct intel_atomic_state *state);
 	void (*update_wm)(struct intel_crtc *crtc);
-	int (*modeset_calc_cdclk)(struct drm_atomic_state *state);
+	int (*modeset_calc_cdclk)(struct intel_atomic_state *state);
 	/* Returns the active state of the crtc, and if the crtc is active,
 	 * fills out the pipe-config with the hw state. */
 	bool (*get_pipe_config)(struct intel_crtc *,

drivers/gpu/drm/i915/intel_display.c

@@ -13271,7 +13271,7 @@ static int intel_modeset_checks(struct drm_atomic_state *state)
 	if (dev_priv->display.modeset_calc_cdclk) {
 		enum pipe pipe;
 
-		ret = dev_priv->display.modeset_calc_cdclk(state);
+		ret = dev_priv->display.modeset_calc_cdclk(intel_state);
 		if (ret < 0)
 			return ret;