Change in coreboot[master]: driver/i2c: Add sx9360 driver

[Tim Wawrzynczak (Code Review)]

Attention is currently required from: Gwendal Grignou.
Tim Wawrzynczak has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/59608 )

Change subject: driver/i2c: Add sx9360 driver
......................................................................

Patch Set 4: Code-Review+1

(2 comments)

File src/drivers/i2c/sx9360/sx9360.c:

https://review.coreboot.org/c/coreboot/+/59608/comment/703b9ac5_25450c3e 
PS4, Line 76: #undef REGISTER
what is this for?

https://review.coreboot.org/c/coreboot/+/59608/comment/2bd9b542_135788b2 
PS4, Line 95: struct drivers_i2c_sx9360_config *config = dev->chip_info;
            : 
            : 	if (!config) {
            : 		dev->enabled = 0;
            : 		return;
            : 	}
```
if (!is_dev_enabled(dev))
     return;
```

should be good enough