west: update west to latest zephyr changes

Update zephyr branch in west file to commit:
driver: ssp: reorganize ssp ip acquired flow

Signed-off-by: Damian Nikodem <damian.nikodem@intel.com>

west.yml

@@ -43,7 +43,7 @@ manifest:
 
     - name: zephyr
       repo-path: zephyr
-      revision: 97a97c744a294ba14278a1f436d46eaa2d488354
+      revision: pull/74621/head
       remote: zephyrproject
 
       # Import some projects listed in zephyr/west.yml@revision