staging: mt7621-dts: fix pinctrl-0 items to be size-1 items on ethernet

staging: mt7621-dts: fix pinctrl-0 items to be size-1 items on ethernet

Fix pinctrl-0 items under the ethernet node to be size-1 items.
Current notation would be used on specifications with non-zero cells.

Fixes: 0a93c0d75809 ("staging: mt7621-dts: fix pinctrl properties for ethernet")
Reported-by: Sander Vanheule <sander@svanheule.net>
Signed-off-by: Arınç ÜNAL <arinc.unal@arinc9.com>
Link: https://lore.kernel.org/r/20220215081725.3463-1-arinc.unal@arinc9.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>