drm/i915: Always use intel_get_crtc_for_pipe()

Replace the open coded dev_priv->pipe_to_crtc_mapping[] usage with
intel_get_crtc_for_pipe().

Mostly done with coccinelle, with a few manual tweaks

@@
expression E1, E2;
@@
(
- E1->pipe_to_crtc_mapping[E2]
+ intel_get_crtc_for_pipe(E1, E2)
|
- E1->plane_to_crtc_mapping[E2]
+ intel_get_crtc_for_plane(E1, E2)
)

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1477946245-14134-12-git-send-email-ville.syrjala@linux.intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>

drivers/gpu/drm/i915/i915_debugfs.c

@@ -4065,7 +4065,7 @@ static void hsw_trans_edp_pipe_A_crc_wa(struct drm_i915_private *dev_priv,
 					bool enable)
 {
 	struct drm_device *dev = &dev_priv->drm;
-	struct intel_crtc *crtc = dev_priv->pipe_to_crtc_mapping[PIPE_A];
+	struct intel_crtc *crtc = intel_get_crtc_for_pipe(dev_priv, PIPE_A);
 	struct intel_crtc_state *pipe_config;
 	struct drm_atomic_state *state;
 	int ret = 0;
@@ -4203,7 +4203,8 @@ static int pipe_crc_set_source(struct drm_i915_private *dev_priv,
 	/* real source -> none transition */
 	if (source == INTEL_PIPE_CRC_SOURCE_NONE) {
 		struct intel_pipe_crc_entry *entries;
-		struct intel_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
+		struct intel_crtc *crtc = intel_get_crtc_for_pipe(dev_priv,
+								  pipe);
 
 		DRM_DEBUG_DRIVER("stopping CRCs for pipe %c\n",
 				 pipe_name(pipe));