Use sof sdw as default sdw machine #7620

Job	Run time
Sparse check	3m 54s
GCC static -fanalyzer	3m 48s
GCC build X86_64 with W=1	2m 34s
Clang build x86_64	4m 42s
GCC build X86_64 with W=1 allmodconfig	1m 47s
GCC build i386	15m 19s
GCC build X86_64	16m 21s
GCC build arm64	20m 20s
GCC build arm64 allmodconfig	2m 19s
	1h 11m 4s

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