ARM: dts: vf: vf610-zii-cfu1: rename node name *-gpio to *-gpios

Rename node name *-gpio to *-gpios to fix below CHECK_DTB warning:

arch/arm/boot/dts/nxp/vf/vf610-zii-cfu1.dtb: sfp (sff,sff):
    'los-gpio', 'tx-disable-gpio' do not match any of the regexes: 'pinctrl-[0-9]+'

Signed-off-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>