irqdomain: remoteproc: Switch to of_fwnode_handle()

of_node_to_fwnode() is irqdomain's reimplementation of the "officially"
defined of_fwnode_handle(). The former is in the process of being
removed, so use the latter instead.

Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
Cc: Bjorn Andersson <andersson@kernel.org>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: linux-remoteproc@vger.kernel.org
Link: https://lore.kernel.org/r/20250319092951.37667-10-jirislaby@kernel.org
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>

Author: Jiri Slaby (SUSE)

drivers/remoteproc/pru_rproc.c

@@ -563,7 +563,7 @@ static int pru_handle_intrmap(struct rproc *rproc)
 		return -ENODEV;
 	}
 
-	fwspec.fwnode = of_node_to_fwnode(irq_parent);
+	fwspec.fwnode = of_fwnode_handle(irq_parent);
 	fwspec.param_count = 3;
 	for (i = 0; i < pru->evt_count; i++) {
 		fwspec.param[0] = rsc->pru_intc_map[i].event;