Change in coreboot[master]: mb/google/guybrush: Override I2C3 pad configuration

[Raul Rangel (Code Review)]

Attention is currently required from: Jason Glenesk, Martin Roth, Marshall Dawson, Karthik Ramasubramanian, Felix Held.
Raul Rangel has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/55149 )

Change subject: mb/google/guybrush: Override I2C3 pad configuration
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Patch Set 3:

(1 comment)

File src/mainboard/google/guybrush/variants/baseboard/devicetree.cb:

https://review.coreboot.org/c/coreboot/+/55149/comment/82e61c40_99102371 
PS3, Line 55: i2c_pad_ctrl_rx_sel
Hrmm, it would have been nice to group this with the other i2c config: https://source.chromium.org/chromiumos/chromiumos/codesearch/+/main:src/thir...

How would we feel about adding a voltage into struct dw_i2c_bus_config?

The other option is we create an AMD specific i2c_bus_config that also contains i2c_scl_reset above. We would need to translate this into a dw_i2c_bus_config in soc_get_i2c_bus_config.

I kind of like this approach because then we can keep all the configuration grouped.