west.yml: update to current Zephyr

Update to Zephyr commit 911b3da1394dc6846c706868b1d407495701926f

* kernel: Clean-up lingering code coverage exclusion flag

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

Author: marcinszkudlinski

west.yml

@@ -43,7 +43,7 @@ manifest:
 
     - name: zephyr
       repo-path: zephyr
-      revision: 9f4bd38ef7d3b52a41e715f45c9a4b2d9caf3bc4
+      revision: 911b3da1394dc6846c706868b1d407495701926f
       remote: zephyrproject
 
       # Import some projects listed in zephyr/west.yml@revision