irqchip/mmp: Do not call irq_set_default_host() on DT platforms

Using a default domain on DT platforms is unnecessary, as the firmware
tables describe the full topology, and nothing is implicit.
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
[maz: wrote an actual changelog]
Signed-off-by: Marc Zyngier <maz@kernel.org>

drivers/irqchip/irq-mmp.c

@@ -395,7 +395,6 @@ static int __init mmp_of_init(struct device_node *node,
 	icu_data[0].conf_enable = mmp_conf.conf_enable;
 	icu_data[0].conf_disable = mmp_conf.conf_disable;
 	icu_data[0].conf_mask = mmp_conf.conf_mask;
-	irq_set_default_host(icu_data[0].domain);
 	set_handle_irq(mmp_handle_irq);
 	max_icu_nr = 1;
 	return 0;
@@ -414,7 +413,6 @@ static int __init mmp2_of_init(struct device_node *node,
 	icu_data[0].conf_enable = mmp2_conf.conf_enable;
 	icu_data[0].conf_disable = mmp2_conf.conf_disable;
 	icu_data[0].conf_mask = mmp2_conf.conf_mask;
-	irq_set_default_host(icu_data[0].domain);
 	set_handle_irq(mmp2_handle_irq);
 	max_icu_nr = 1;
 	return 0;