Change in coreboot[master]: google/poppy: Add SX9310 support

[Enrico Granata (Code Review)]

Hello Gwendal Grignou, build bot (Jenkins), Furquan Shaikh,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/27172

to look at the new patch set (#2).

Change subject: google/poppy: Add SX9310 support
......................................................................

google/poppy: Add SX9310 support

Prepare a driver for the Semtech SX9310, with the purpose of
allowing the device's calibration to be stored in firmware, and
then passed on to the kernel via ACPI.

Use this new driver in the devicetree for Nocturne.

Change-Id: I7358ee34df873098a86d692cc8a909b0ec5023a8
Signed-off-by: Enrico Granata 
---
A src/drivers/i2c/sx9310/Kconfig
A src/drivers/i2c/sx9310/Makefile.inc
A src/drivers/i2c/sx9310/chip.h
A src/drivers/i2c/sx9310/registers.h
A src/drivers/i2c/sx9310/sx9310.c
M src/mainboard/google/poppy/Kconfig
M src/mainboard/google/poppy/variants/nocturne/devicetree.cb
7 files changed, 261 insertions(+), 2 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/72/27172/2