[RFC] soundwire: add runtime BPT support #8035

Job	Run time
Sparse check	3m 23s
GCC static -fanalyzer	3m 16s
GCC build X86_64 with W=1	3m 11s
GCC build arm64 allmodconfig	1m 58s
GCC build arm64	22m 9s
Clang build x86_64	4m 47s
GCC build X86_64 with W=1 allmodconfig	2m 9s
GCC build i386	16m 39s
GCC build X86_64	20m 10s
	1h 17m 42s

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