Change in coreboot[master]: mb/google/corsola: Support audio

[Paul Menzel (Code Review)]

Attention is currently required from: Hung-Te Lin, Rex-BC Chen, yu jiaxin, Yu-Ping Wu.
Paul Menzel has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/60738 )

Change subject: mb/google/corsola: Support audio
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Patch Set 4:

(3 comments)

Commit Message:

https://review.coreboot.org/c/coreboot/+/60738/comment/8a45129c_f19e4e10 
PS4, Line 7: Support
Configure

https://review.coreboot.org/c/coreboot/+/60738/comment/178f1c9f_99e19b9a 
PS4, Line 9: Turn on setting of audio power and select I2S pin-mux.
… according to schematics?

File src/mainboard/google/corsola/mainboard.c:

https://review.coreboot.org/c/coreboot/+/60738/comment/e7abe88f_34f4abbf 
PS3, Line 29: 	/* Power on audio */
Unnecessary, as the function name is descriptive enough.