Change in coreboot[master]: mb/google/brya: Set SerialIoI2cMode for I2C4 as PchSerialIoDisabled

[Furquan Shaikh (Code Review)]

Attention is currently required from: Tim Wawrzynczak, Subrata Banik.
Furquan Shaikh has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/55170 )

Change subject: mb/google/brya: Set SerialIoI2cMode for I2C4 as PchSerialIoDisabled
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Patch Set 2:

(1 comment)

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

https://review.coreboot.org/c/coreboot/+/55170/comment/d7f67be6_6ef209ee 
PS2, Line 121: .i2c[4] = {
             : 			.speed = I2C_SPEED_FAST,
             : 		},
Drop this too?