arch: arm64: dts: lx2160a-clearfog-itx: rename the sfp GPIO properties

Rename the 'mod-def0-gpio' property to 'mod-def0-gpios' so that we use
the preferred -gpios suffix. Also, with this change the dtb_check will
not complain when trying to verify the DTS against the sff,sfp.yaml
binding.

Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>