drm/i915/audio: move intel_audio_funcs internal to intel_audio.c

It's all internal to intel_audio.c.

Cc: Dave Airlie <airlied@redhat.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211104161858.21786-4-jani.nikula@intel.com

drivers/gpu/drm/i915/display/intel_audio.c

@@ -62,6 +62,15 @@
  * struct &i915_audio_component_audio_ops @audio_ops is called from i915 driver.
  */
 
+struct intel_audio_funcs {
+	void (*audio_codec_enable)(struct intel_encoder *encoder,
+				   const struct intel_crtc_state *crtc_state,
+				   const struct drm_connector_state *conn_state);
+	void (*audio_codec_disable)(struct intel_encoder *encoder,
+				    const struct intel_crtc_state *old_crtc_state,
+				    const struct drm_connector_state *old_conn_state);
+};
+
 /* DP N/M table */
 #define LC_810M	810000
 #define LC_540M	540000

drivers/gpu/drm/i915/i915_drv.h

@@ -364,15 +364,6 @@ struct intel_color_funcs {
 	void (*read_luts)(struct intel_crtc_state *crtc_state);
 };
 
-struct intel_audio_funcs {
-	void (*audio_codec_enable)(struct intel_encoder *encoder,
-				   const struct intel_crtc_state *crtc_state,
-				   const struct drm_connector_state *conn_state);
-	void (*audio_codec_disable)(struct intel_encoder *encoder,
-				    const struct intel_crtc_state *old_crtc_state,
-				    const struct drm_connector_state *old_conn_state);
-};
-
 struct intel_cdclk_funcs {
 	void (*get_cdclk)(struct drm_i915_private *dev_priv,
 			  struct intel_cdclk_config *cdclk_config);
@@ -829,6 +820,7 @@ struct i915_selftest_stash {
 };
 
 /* intel_audio.c private */
+struct intel_audio_funcs;
 struct intel_audio_private {
 	/* Display internal audio functions */
 	const struct intel_audio_funcs *funcs;