Use sof sdw as default sdw machine #7814

Job	Run time
GCC static -fanalyzer	3m 5s
GCC build X86_64 with W=1	3m 13s
GCC build X86_64 with W=1 allmodconfig	2m 5s
Sparse check	3m 23s
Clang build x86_64	4m 51s
GCC build i386	2m 42s
GCC build X86_64	23m 19s
GCC build arm64 allmodconfig	3m 37s
GCC build arm64	22m 23s
	1h 8m 38s

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