[RFC] soundwire: add runtime BPT support #8044

Job	Run time
GCC static -fanalyzer	4m 23s
Sparse check	3m 24s
GCC build X86_64 with W=1 allmodconfig	2m 2s
GCC build X86_64	19m 44s
GCC build i386	16m 48s
GCC build arm64	22m 9s
GCC build arm64 allmodconfig	2m 5s
GCC build X86_64 with W=1	3m 29s
Clang build x86_64	4m 59s
	1h 19m 3s

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