Change in coreboot[master]: drivers/i2c/cs42l42: Add driver for generating device in SSDT

[Karthik Ramasubramanian (Code Review)]

Attention is currently required from: Furquan Shaikh, Martin Roth, Vitaly Rodionov, Zhuohao Lee, EricR Lai.
Karthik Ramasubramanian has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/52395 )

Change subject: drivers/i2c/cs42l42: Add driver for generating device in SSDT
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Patch Set 4:

(1 comment)

File src/drivers/i2c/cs42l42/chip.h:

https://review.coreboot.org/c/coreboot/+/52395/comment/337c8b22_c72a5d39 
PS4, Line 74: /* headset bias ramp rate */
> What are the expected values for this?

As mentioned earlier, it is better to have a enum so that the configuration in the devicetree are readable and correct. Otherwise it will all be magic numbers and hard to read/understand.