Running "chromeos/scripts/kernelconfig olddefconfig results in:

sound/soc/intel/Kconfig:106:error: recursive dependency detected!
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
sound/soc/intel/Kconfig:106:	symbol SND_SOC_INTEL_SKYLAKE is selected by SND_SOC_INTEL_GLK_RT5682_MAX98357A_MACH
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
sound/soc/intel/boards/Kconfig:287:	symbol SND_SOC_INTEL_GLK_RT5682_MAX98357A_MACH depends on SND_SOC_INTEL_SKYLAKE
.config:4967:warning: symbol value 'm' invalid for SND_SOC_INTEL_MACH
.config:4974:warning: symbol value 'm' invalid for SND_SOC_INTEL_SST_TOPLEVEL