ARM: dts: imx6qdl-colibri: Fix capacitive touch reset polarity

The commit feedaacd ("Input: atmel_mxt_ts - fix up inverted RESET
handler") requires the reset GPIO to have GPIO_ACTIVE_LOW.

Fixes: 1524b27c

 ("ARM: dts: imx6dl-colibri: Move common nodes to SoM dtsi")
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>