Add portable pin config macros to mphalport.h. And add a function to
configure pins with more pin options such as alt function, pull, speed,
drive, interrupt mode, etc.
Note: this new `machine_pin_config()` function can replace
`machine_pin_set_mode()`, but the latter is left as-is to avoid breaking
anything.
Signed-off-by: iabdalkader <i.abdalkader@gmail.com>
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