drm/i915/audio: group audio under anonymous struct in drm_i915_private

With an anonymous struct, this can be pure hierarchical organization
without code changes. We'll follow up with adding a name to the
sub-struct separately.

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/20211104161858.21786-1-jani.nikula@intel.com

drivers/gpu/drm/i915/i915_drv.h

@@ -995,9 +995,6 @@ struct drm_i915_private {
 	/* Display internal color functions */
 	const struct intel_color_funcs *color_funcs;
 
-	/* Display internal audio functions */
-	const struct intel_audio_funcs *audio_funcs;
-
 	/* Display CDCLK functions */
 	const struct intel_cdclk_funcs *cdclk_funcs;
 
@@ -1084,17 +1081,6 @@ struct drm_i915_private {
 	struct drm_property *broadcast_rgb_property;
 	struct drm_property *force_audio_property;
 
-	/* hda/i915 audio component */
-	struct i915_audio_component *audio_component;
-	bool audio_component_registered;
-	/**
-	 * av_mutex - mutex for audio/video sync
-	 *
-	 */
-	struct mutex av_mutex;
-	int audio_power_refcount;
-	u32 audio_freq_cntrl;
-
 	u32 fdi_rx_config;
 
 	/* Shadow for DISPLAY_PHY_CONTROL which can't be safely read */
@@ -1227,14 +1213,29 @@ struct drm_i915_private {
 
 	bool ipc_enabled;
 
-	/* Used to save the pipe-to-encoder mapping for audio */
-	struct intel_encoder *av_enc_map[I915_MAX_PIPES];
-
-	/* necessary resource sharing with HDMI LPE audio driver. */
 	struct {
-		struct platform_device *platdev;
-		int	irq;
-	} lpe_audio;
+		/* Display internal audio functions */
+		const struct intel_audio_funcs *audio_funcs;
+
+		/* hda/i915 audio component */
+		struct i915_audio_component *audio_component;
+		bool audio_component_registered;
+		/**
+		 * av_mutex - mutex for audio/video sync
+		 */
+		struct mutex av_mutex;
+		int audio_power_refcount;
+		u32 audio_freq_cntrl;
+
+		/* Used to save the pipe-to-encoder mapping for audio */
+		struct intel_encoder *av_enc_map[I915_MAX_PIPES];
+
+		/* necessary resource sharing with HDMI LPE audio driver. */
+		struct {
+			struct platform_device *platdev;
+			int irq;
+		} lpe_audio;
+	};
 
 	struct i915_pmu pmu;