Main domain in J721E has the following interrupt controller instances:
- Main Domain GPIO Interrupt router connected to gpio in main domain.
- Under the Main Domain Navigator Subsystem(NAVSS)
	- Main Navss Interrupt Router connected to main navss inta and mailboxes.
	- Main Navss Interrupt Aggregator connected to main domain UDMASS

Add DT nodes for the interrupt controllers available in main domain.
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>