Revert "irqchip/xilinx: Do not call irq_set_default_host()"

This reverts commit 9c2d4f525c, which
breaks a number of PPC platforms.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/44b64be7-9240-fd52-af90-e0245220f38b@xilinx.com

drivers/irqchip/irq-xilinx-intc.c

@@ -250,6 +250,7 @@ static int __init xilinx_intc_of_init(struct device_node *intc,
 		}
 	} else {
 		primary_intc = irqc;
+		irq_set_default_host(primary_intc->root_domain);
 		set_handle_irq(xil_intc_handle_irq);
 	}