manifest: sdk-zephyr: pull in gen_periphconf_entries.py

Pull in new build system support for generating PERIPHCONF entries
based on devicetree. This commit is deliberately split from the related
build system changes to enable cherry-picking those without the
manifest update.

Ref: NCSDK-35206

Signed-off-by: Jonathan Nilsen <[email protected]>

Author: jonathannilsen

west.yml

@@ -65,7 +65,7 @@ manifest:
     # https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/guides/modules.html
     - name: zephyr
       repo-path: sdk-zephyr
-      revision: d4bb1c6b9f1c941480a457b18ae36c9bdf49faa7
+      revision: pull/3276/head
       import:
         # In addition to the zephyr repository itself, NCS also
         # imports the contents of zephyr/west.yml at the above