Revert "[nrf fromlist] manifest: update hal_nordic revision to pull in nrfconnect#293"

This reverts commit b1c7699.

Signed-off-by: Robert Lubos <robert.lubos@nordicsemi.no>

Author: rlubos

west.yml

@@ -198,7 +198,7 @@ manifest:
       groups:
         - hal
     - name: hal_nordic
-      revision: 243c6708278364516c6ca1dcccc00c5f721095fa
+      revision: a5a2277d4399939e9aa67a71ca9eb411c85a1a7d
       path: modules/hal/nordic
       groups:
         - hal