ext: hal: openisa: sync with updates for BLE SW LL

There are a couple of commits that are needed for
the BLE SW LL to function properly on the VEGABoard:
- TRNG entropy driver
- GenFSK radio enablement + configuration

As such, make sure that the commit in the manifest
points to the appropriate SHA in the hal/openisa
repo.

Signed-off-by: Alex Porosanu <alexandru.porosanu@nxp.com>

west.yml

@@ -47,7 +47,7 @@ manifest:
       revision: 080d1dff4a07b5798ab979fde40dde8da452b854
       path: modules/hal/nordic
     - name: hal_openisa
-      revision: 0cbbf29f1523fe2970e57622bd79d9b115ca84e5
+      revision: 6416140c00f7e663752bd420ba89e3caefc1d70e
       path: modules/hal/openisa
     - name: hal_microchip
       revision: 85302959c0c659311cf90ac51d133e5ce19c9288