Use the recently introduced mikrobus_spi devicetree node as parent node
instead of relying on mapping for arduino_spi.
Signed-off-by: Henrik Brix Andersen <henrik@brixandersen.dk>
Add shield definition for the MikroElektronika ADC Click. The ADC
Click carries a MCP3204 12-bit Analog-to-Digital converter in a
mikroBUS form factor.
Signed-off-by: Henrik Brix Andersen <hebad@vestas.com>