manifest: Update hal_nxp

Update hal_nxp to contain the IRQ_STEER revision 2-related
changes. This is only temporary. When the HAL changes get
merged, the manifest will point to a hash instead of a PR.

Signed-off-by: Laurentiu Mihalcea <laurentiu.mihalcea@nxp.com>

west.yml

@@ -193,7 +193,7 @@ manifest:
       groups:
         - hal
     - name: hal_nxp
-      revision: a87e6a8ba3af330fc43f9ed93ce3748416e1009d
+      revision: pull/281/head
       path: modules/hal/nxp
       groups:
         - hal