ARM: dts: BCM5301X: Relicense AXI interrupts code to the GPL 2.0+ / MIT

ARM: dts: BCM5301X: Relicense AXI interrupts code to the GPL 2.0+ / MIT

Those entries were added by:
1. Hauke in commits dec378827c4a ("ARM: BCM5301X: Add IRQs to Broadcom's
   bus-axi in DTS file") and 1f80de6863ca ("ARM: BCM5301X: add IRQ
   numbers for PCIe controller")
2. Florian in the commit 2cd0c0202f13 ("ARM: dts: BCM5301X: Add SRAB
   interrupts")

Move them to the bcm-ns.dtsi which uses dual licensing. That syncs more
Northstar code to be based on the same licensing schema.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Cc: Hauke Mehrtens <hauke@hauke-m.de>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Hauke Mehrtens <hauke@hauke-m.de>
Link: https://lore.kernel.org/r/20230515151921.25021-2-zajec5@gmail.com
Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>