ARM: dts: armv7-m: add unit name to interrupt-controller
Add unit name to nvic to remove the following warning:
Warning (unit_address_vs_reg): Node /nv-interrupt-controller has a reg or ranges property, but no unit name
Also correct the node name to 'interrupt-controller'
while changing the line.
Signed-off-by: Joachim Eastwood <manabian@gmail.com> Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Acked-by: Stefan Agner <stefan@agner.ch>