ARM: dts: BCM5301X: Relicense Vivek's code to the GPL 2.0+ / MIT

ARM: dts: BCM5301X: Relicense Vivek's code to the GPL 2.0+ / MIT

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

This code was added in the commit 37f6130ec39f ("ARM: dts: BCM5301X:
Make USB 3.0 PHY use MDIO PHY driver").

Cc: Vivek Unune <npcomplete13@gmail.com>
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Acked-by: Vivek Unune <npcomplete13@gmail.com>
Link: https://lore.kernel.org/r/20230916085855.28375-1-zajec5@gmail.com
Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>