west.yml: update zephyr to a4123a8ea2c

Total of 173 commits.

Changes include:

fb53d2ef8dd ace: power: replace pseudo-assembly movi

Signed-off-by: Tomasz Leman <tomasz.m.leman@intel.com>

Author: tmleman

west.yml

@@ -43,7 +43,7 @@ manifest:
 
     - name: zephyr
       repo-path: zephyr
-      revision: 650227d8c47f183b8c520b9abbbada2515982d05
+      revision: a4123a8ea2cacae682a1c359bba467f1d4e7c1cf
       remote: zephyrproject
 
       # Import some projects listed in zephyr/west.yml@revision