Change in coreboot[master]: mb/google/dedede/var/boten: support Audio AMP I2C/Auto mode

[Karthik Ramasubramanian (Code Review)]

Attention is currently required from: Henry Sun, Stanley Wu, Paul Fagerburg.
Karthik Ramasubramanian has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/52319 )

Change subject: mb/google/dedede/var/boten: support Audio AMP I2C/Auto mode
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Patch Set 5: Code-Review+2

(2 comments)

Commit Message:

https://review.coreboot.org/c/coreboot/+/52319/comment/2d4b16e1_42dd8693 
PS5, Line 7: support Audio AMP I2C/Auto mode
Probe and enable amplifier operation mode.

https://review.coreboot.org/c/coreboot/+/52319/comment/4d4db1dd_476a2f03 
PS5, Line 9: support audio AMP selection with fw_config.
Probe the fw_config for RT1015 speaker amplifier operation mode and enable it accordingly in the device tree.