We need to be able to specify GPIO flags in devicetree without that
preventing translation from the Arduino specifier to the host GPIO
specifier. Set up to ignore the low 6 bits of the flags field when
matching the child specifier, and to copy those bits to the parent
specifier.
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
Apply same scheme for all nucleo_64 pins boards:
-provide a separate arduino connector dtsi file
-provide complete gpio map
-update board.yaml vs arduino support (i2c, spi and gpio)
Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>