In this datasheet (MKW40Z Reference Manual) have ADC0_Dm0 pin define is ADC Channel 0 Differential Input negitive. but FRDM-KW40Z Schematics this pin ADC0_DP0 was used by ADC0_SE1/POT.
so this datasheet (MKW40Z Reference Manual) is old version??
Actually both the datasheet & user maunal and schematic are correct. Please make reference from the table of below:
Per the setting of "SCxn[DIFF]= 0", this means that the input will be single ended and there you'll find the DM channels used as single eneded.