Add line about DTS files

Signed-off-by: Saikrishna Arcot <[email protected]>

Author: saiarcot895

README.md

@@ -17,6 +17,7 @@ This repository contains the scripts and patches to build the kernel for SONiC.
   - Those patches will be upstreamed or are in the process of being upstreamed.
     - If being upstreamed, please include a link to the mail thread in the patch or PR description.
   - Those patches don't make sense to be upstreamed, either because they're applicable only within SONiC or they would break some general use case.
+    - DTS (device tree source) files are acceptable here, as the board description in the files may be applicable to SONiC software only.
 - Platform specific kernel modules which are impossible or very difficult to be built out of kernel tree.
 
 Platform specific kernel modules are expected to develop out-of-tree kernel modules, provide them in debian packages to be embedded into SONiC image and installed on their platforms.