[XS] Change in coreboot[main]: soc/mediatek/common/pcie: Add DEVTREE_CONST qualifier

[Yidi Lin (Code Review)]

Attention is currently required from: Hung-Te Lin, Jianjun Wang, Yidi Lin.

Hello Hung-Te Lin, Jianjun Wang, Yu-Ping Wu, build bot (Jenkins),

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

https://review.coreboot.org/c/coreboot/+/84113?usp=email

to look at the new patch set (#3).

Change subject: soc/mediatek/common/pcie: Add DEVTREE_CONST qualifier
......................................................................

soc/mediatek/common/pcie: Add DEVTREE_CONST qualifier

Currently pcie.c is built into ramstage only, where DEVTREE_CONST is an
empty macro, so there's no problem with that. However, if we would like
to include that file in pre-ramstage, then DEVTREE_CONST would be
'const', leading to the following build error:

```
src/soc/mediatek/common/pcie.c:104:26: error: assignment discards
'const' qualifier from pointer target type [-Werror=discarded-qualifiers]
104 |                 root_dev = pcidev_path_on_root(devfn);
    |                          ^
```

BUG=none
TEST=emerge-cherry coreboot

Change-Id: Ia7c95424019ec0dca50bbc6be7f81b6180d06d6e
Signed-off-by: Yidi Lin 
---
M src/soc/mediatek/common/pcie.c
1 file changed, 1 insertion(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/13/84113/3