hw/driver/adc: Fix pin resolution in da1469x SDADC
hw/driver/adc: Fix pin resolution in da1469x SDADC

da1469x_sdadc_resolve_pins took wrong pin, it checked srcn
but took srcp.

mlaz/mynewt-core,mlaz/mynewt-core,mlaz/mynewt-core,mlaz/mynewt-core,mlaz/mynewt-core