ASoC: Intel: avs: Machine board registration

AVS driver operates with granular audio card division in mind.
Super-card approach (e.g.: I2S, DMIC and HDA DAIs combined) is
deprecated in favour of individual cards - one per each device. This
provides necessary dynamism, especially for configurations with number
of codecs present and makes it easier to survive auxiliary devices
failures - one card failing to probe does not prevent others from
succeeding.

All boards spawned by AVS are unregistered on ->remove(). This includes
dummy codecs such as DMIC.

As all machine boards found in sound/soc/intel/boards are irreversibly
tied to 'super-card' approach, new boards are going to be introduced.
This temporarily increases number of boards available under /intel
directory until skylake-driver becomes deprecated and removed.
Signed-off-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://lore.kernel.org/r/20220516101116.190192-12-cezary.rojewski@intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/avs/Makefile

 # SPDX-License-Identifier: GPL-2.0-only
 
 snd-soc-avs-objs := dsp.o ipc.o messages.o utils.o core.o loader.o \
-		    topology.o path.o pcm.o
+		    topology.o path.o pcm.o board_selection.o
 snd-soc-avs-objs += cldma.o
 
 snd-soc-avs-objs += trace.o

sound/soc/intel/avs/avs.h

@@ -310,6 +310,9 @@ int avs_i2s_platform_register(struct avs_dev *adev, const char *name, unsigned l
 			      unsigned long *tdms);
 int avs_hda_platform_register(struct avs_dev *adev, const char *name);
 
+int avs_register_all_boards(struct avs_dev *adev);
+void avs_unregister_all_boards(struct avs_dev *adev);
+
 /* Firmware tracing helpers */
 
 unsigned int __kfifo_fromio_locked(struct kfifo *fifo, const void __iomem *src, unsigned int len,