ASoC: SOF: Intel: remove hyphen from AMP<index> name_prexix #7936

Job	Run time
GCC static -fanalyzer	4m 12s
GCC build X86_64 with W=1	2m 0s
GCC build arm64	24m 21s
Sparse check	3m 36s
GCC build X86_64	19m 26s
Clang build x86_64	2m 3s
GCC build arm64 allmodconfig	3m 16s
GCC build i386	17m 16s
GCC build X86_64 with W=1 allmodconfig	1m 25s
	1h 17m 35s

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