arm64: dts: freescale: verdin-imx8mm: fix atmel_mxt_ts reset polarity

Fix reset GPIO polarity in-line with the following commit feedaacd
("Input: atmel_mxt_ts - fix up inverted RESET handler").

Fixes: 6a57f224 ("arm64: dts: freescale: add initial support for verdin imx8m mini")
Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>