manifest: Update sdk-nrf-802154 and nrfxlib revisions

This commit updates sdk-nrf-802154 and nrfxlib revisions to bring in
the latest changes in the nrf_802154 component.

Signed-off-by: Andrzej Kuros <andrzej.kuros@nordicsemi.no>

west.yml

@@ -139,7 +139,7 @@ manifest:
  - name: nrfxlib
  repo-path: sdk-nrfxlib
  path: nrfxlib
- revision: 1f01ace08eeec83d4cd1b62116107a7d4ae6bacc
+ revision: 5d878187fa6e510bec2e5bc80264715d1c20be75
  - name: trusted-firmware-m
  repo-path: sdk-trusted-firmware-m
  path: modules/tee/tf-m/trusted-firmware-m
@@ -165,7 +165,7 @@ manifest:
  - name: nrf-802154
  repo-path: sdk-nrf-802154
  path: nrf-802154
- revision: 109821b9e3a9b1d3536e2ab86b6d174e2af64743
+ revision: d08f6e6e546e23fa5894296ed4859111b3b9dc46
  groups:
  - nrf-802154
  - name: dragoon