ASoC: makes CPU/Codec channel connection map more generic

Current ASoC CPU:Codec = N:M connection is using connection mapping idea,
but it is used for N < M case only. We want to use it for any case.

By this patch, not only N:M connection, but all existing connection
(1:1, 1:N, N:N) will use same connection mapping. Then, because it will
use default mapping, no conversion patch is needed to exising drivers.

More over, CPU:Codec = N:M (N > M) also supported in the same time.

ch_maps array will has CPU/Codec index by this patch.

Image
	CPU0 <---> Codec0
	CPU1 <-+-> Codec1
	CPU2 <-/

ch_map
	ch_map[0].cpu = 0	ch_map[0].codec = 0
	ch_map[1].cpu = 1	ch_map[1].codec = 1
	ch_map[2].cpu = 2	ch_map[2].codec = 1

Link: https://lore.kernel.org/r/[email protected]
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Kuninori Morimoto <[email protected]>
Reviewed-by: Bard Liao <[email protected]>
Tested-by: Pierre-Louis Bossart <[email protected]>
Tested-by: Jerome Brunet <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Mark Brown <[email protected]>

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