[S] Change in coreboot[master]: mb/google/myst: Enable USB WWAN

[Eric Lai (Code Review)]

Attention is currently required from: Eric Lai, Jon Murphy, Karthik Ramasubramanian, Tim Van Patten.

Hello Jon Murphy, Karthik Ramasubramanian, Paul Menzel, Tim Van Patten, build bot (Jenkins),

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

https://review.coreboot.org/c/coreboot/+/75660?usp=email

to look at the new patch set (#4).

Change subject: mb/google/myst: Enable USB WWAN
......................................................................

mb/google/myst: Enable USB WWAN

Add usb wwan device tree entry. Also set wwan_rst to high due to
HW design active high.

BUG=b:285792436
TEST=check FM101 is detected by Linux kernel.
Bus 002 Device 002: ID 2cb7:01a2 Fibocom Wireless Inc.

Signed-off-by: Eric Lai 
Change-Id: I0aa60cb284d4b7f99e16643a92ee58467a355026
---
M src/mainboard/google/myst/variants/baseboard/devicetree.cb
M src/mainboard/google/myst/variants/baseboard/gpio.c
2 files changed, 20 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/60/75660/4