These worked because edtlib allows 'pinctrl-.*' properties without
specifying them on the bindings. However, this has never been an
anounced pinctrl feature, the reference documents explicitly mention
that usage of pinctrl-device.yaml is mandatory.
Signed-off-by: Gerard Marull-Paretas <gerard@teslabs.com>
Create dac_mcxu_lpdac.c file to implement mcux lpdac, add binding for
the mcux lpdac, update Kconfig.mcux and CMakeLists.txt file to support
mcux lpdac.
Signed-off-by: Albort Xue <yao.xue@nxp.com>