ARM: dts: imx6ul-14x14-evk: Remove unrelated pin from ENET group

MX6UL_PAD_SNVS_TAMPER0__GPIO5_IO00 is connected to the INT1 pin of
the FXLS8471Q accelerometer, so remove it from the unrelated ENET
group.

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>