ALSA: hda - Relocate RIRB/CORB interface to hda_controller

This is done to allow an HDA platform driver to reuse the code.

A few of the interfaces added to hda_controller will disappear in
following commits as their users are also moved to hda_controller.
Signed-off-by: Dylan Reid <dgreid@chromium.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/hda_controller.h

@@ -47,4 +47,15 @@ void azx_load_dsp_cleanup(struct hda_bus *bus,
 int azx_alloc_stream_pages(struct azx *chip);
 void azx_free_stream_pages(struct azx *chip);
 
+/*
+ * CORB / RIRB interface
+ */
+int azx_alloc_cmd_io(struct azx *chip);
+void azx_init_cmd_io(struct azx *chip);
+void azx_free_cmd_io(struct azx *chip);
+void azx_update_rirb(struct azx *chip);
+int azx_send_cmd(struct hda_bus *bus, unsigned int val);
+unsigned int azx_get_response(struct hda_bus *bus,
+			      unsigned int addr);
+
 #endif /* __SOUND_HDA_CONTROLLER_H */