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

[Yidi Lin (Code Review)]

Yidi Lin has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/84113?usp=email )

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

soc/mediatek/common/pcie: Add DEVTREE_CONST qualifier

Fix the compilation error for

```
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/13/84113/1

diff --git a/src/soc/mediatek/common/pcie.c b/src/soc/mediatek/common/pcie.c
index ce9055a..c07cc4f 100644
--- a/src/soc/mediatek/common/pcie.c
+++ b/src/soc/mediatek/common/pcie.c
@@ -96,7 +96,7 @@

static uintptr_t mtk_pcie_get_controller_base(pci_devfn_t devfn)
 {
-	struct device *root_dev;
+	DEVTREE_CONST struct device *root_dev;
    const mtk_soc_config_t *config;
    static uintptr_t base = 0;