[RFC] soundwire: add runtime BPT support #8513

Job	Run time
GCC build X86_64 with W=1	3m 4s
GCC build arm64 allmodconfig	1m 41s
Clang build x86_64	4m 30s
GCC build arm64	22m 13s
GCC build i386	17m 47s
GCC static -fanalyzer	4m 16s
GCC build X86_64 with W=1 allmodconfig	1m 40s
Sparse check	3m 51s
GCC build X86_64	20m 13s
	1h 19m 15s

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