Change in coreboot[master]: sconfig: Ensure at least one `device` node below each `chip`

[Nico Huber (Code Review)]

Attention is currently required from: Nico Huber, Martin Roth, Arthur Heymans, Kevin Keijzer.
Hello build bot (Jenkins), Patrick Georgi, Martin Roth, Tim Wawrzynczak, Angel Pons, Arthur Heymans, Kevin Keijzer,

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

https://review.coreboot.org/c/coreboot/+/51119

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

Change subject: sconfig: Ensure at least one `device` node below each `chip`
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sconfig: Ensure at least one `device` node below each `chip`

Even though `device` entries are children of `chip` entries in the
devicetree source format, the chips in the translated C structures
are only hooked up to device nodes. Hence, any chip with all its
settings will be silently dropped by sconfig if there is no device
node below it.

Let's adapt the parser to ensure that there is at least one `device`
entry. The intermediate `chipchidren_dev` rule applies until the
first `device` entry is found, then everything continues as before
with the `chipchidren` rule.

Change-Id: I54830bc1fc7d00a0605f3fe4d36a83ef57ef3312
Signed-off-by: Nico Huber 
---
M util/sconfig/sconfig.tab.c_shipped
M util/sconfig/sconfig.tab.h_shipped
M util/sconfig/sconfig.y
3 files changed, 160 insertions(+), 147 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/19/51119/4