ARM: dts: bcm2711: Add firmware usb reset node

Now that the reset driver exposing Raspberry Pi 4's firmware based USB
reset routine is available, let's add the device tree node exposing it.

Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Link: https://lore.kernel.org/r/20200629161845.6021-4-nsaenzjulienne@suse.de


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>