update Zephyr: nvl: Disable SRAM retention mode for ACE 4

Signed-off-by: Marcin Szkudlinski <marcin.szkudlinski@intel.com>

Author: marcinszkudlinski

west.yml

@@ -43,7 +43,7 @@ manifest:
 
     - name: zephyr
       repo-path: os.rtos.zephyr.zephyr
-      revision: 127f1a9b228cefaf3b6fca95ad9df7fa2bf76e72
+      revision: 8756878775d5af4197c5d68b0ed5831d759cce49
       remote: intel
 
       # Import some projects listed in zephyr/west.yml@revision