ARM: dts: imx6ull-colibri: change touch i2c parameters

Switch on 22 kOhm pull-ups and lower the I2C frequency to around 40 kHz
to get more reliable communication.

Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>
Signed-off-by: Denys Drozdov <denys.drozdov@toradex.com>
Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>