maanifest: Update Zephyr revision

Point to a batch merge:
nrfconnect/sdk-zephyr#2339

Signed-off-by: Carles Cufi <[email protected]>

Author: carlescufi

west.yml

@@ -69,7 +69,7 @@ manifest:
     # https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/guides/modules.html
     - name: zephyr
       repo-path: sdk-zephyr
-      revision: 48cdbacbd7ee834f9d874be7c4c1c7dc372cedf4
+      revision: 15ffa301b3294a769752ad0a1d382bce9803f265
       import:
         # In addition to the zephyr repository itself, NCS also
         # imports the contents of zephyr/west.yml at the above