Change in coreboot[master]: drivers/i2c/dw_i2c: Add detect callback to i2c_bus_ops

[Tim Wawrzynczak (Code Review)]

Attention is currently required from: Raul Rangel, Subrata Banik, Matt DeVillier, Karthik Ramasubramanian.
Tim Wawrzynczak has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/63210 )

Change subject: drivers/i2c/dw_i2c: Add detect callback to i2c_bus_ops
......................................................................

Patch Set 2:

(1 comment)

File src/drivers/i2c/designware/dw_i2c.c:

https://review.coreboot.org/c/coreboot/+/63210/comment/b110a633_02c14589 
PS1, Line 544: dw_i2c_disable
> Can an interrupt sneak in between the clear and disable? Should we disable before clearing? […]

Seems unlikely in this case, as the bus has already gone idle, so the transaction is done from the controller perspective, and the target device cannot initiate anything.