meta-phosphor: repotest: prohibit new DTS files

DTS files should be submitted upstream to the kernel, just like patches.
Allowing individual DTS files to be added to the tree is just another
form of patching the kernel.  Explicitly search and prohibit new ones
from being added.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Ibd176423cda5082ead3bf1d3da1e66507e0ea475
diff --git a/meta-phosphor/scripts/run-repotest b/meta-phosphor/scripts/run-repotest
index ff6a4f8..6cd0db2 100755
--- a/meta-phosphor/scripts/run-repotest
+++ b/meta-phosphor/scripts/run-repotest
@@ -16,7 +16,7 @@
 trap 'rm $patch_files_tmp $allowed_patches_tmp' exit
 
 git ls-files -- \
-  '*.patch' \
+  '*.patch' '*.dts' \
   ':!:poky/**' \
   ':!:meta-arm/**' \
   ':!:meta-security/**' \
@@ -43,6 +43,7 @@
 meta-google/recipes-extended/libconfig/files/0001-conf2struct-Use-the-right-perl.patch
 meta-google/recipes-extended/libconfig/files/0001-makefile-Add-missing-LDFLAGS.patch
 meta-google/recipes-phosphor/initrdscripts/obmc-phosphor-initfs/rwfs-clean-dev.patch
+meta-hpe/meta-dl360poc/recipes-kernel/linux/linux-obmc/gxp.dts
 meta-ingrasys/meta-zaius/recipes-bsp/u-boot/u-boot-aspeed/0001-board-aspeed-Add-reset_phy-for-Zaius.patch
 meta-nuvoton/recipes-bsp/images/npcm7xx-igps/0001-Adjust-paths-for-use-with-Bitbake.patch
 meta-yadro/meta-nicole/recipes-bsp/u-boot/files/0001-Add-system-reset-status-support.patch
@@ -61,7 +62,7 @@
 
 files_count=$(echo -n "$files_diff" | grep -c '^' || true)
 if [[ $files_count -ne 0 ]]; then
-  echo "Patch files found not in allow list"
+  echo "Patch or DTS files found not in allow list"
   echo "$files_diff"
   echo "Patches are not allowed on OpenBMC in these layers.  Please upstream your changes and see \
     https://github.com/openbmc/docs/blob/master/meta-layer-guidelines.md"