staging: mt7621-dts: fix formatting

Fix formatting on mt7621.dtsi.

Reviewed-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Arınç ÜNAL <arinc.unal@arinc9.com>
Link: https://lore.kernel.org/r/20220125153903.1469-2-arinc.unal@arinc9.com


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