Since https://github.com/RIOT-OS/RIOT/pull/20935 gpio_write()
uses a `bool` instead of an `int`. This does the same treatment for
`gpio_read()`.
This does indeed add an instruction to `gpio_read()` implementations.
However, users caring about an instruction more are better served with
`gpio_ll_read()` anyway. And `gpio_read() == 1` is often seen in
newcomer's code, which would now work as expected.
Generated new vendor header files from upstream SVD files using:
./SVDConv "$PICO_SDK_DIR"/src/rp2040/hardware_regs/rp2040.svd \
--generate=header --fields=macro --fields=enum
Note: The missing `--fields=struct` flag resulted in the header no
longer containing bit-fields to represent different fields
within registers. While this would generally ease writing code,
the RP2040 has the unpleasant feature of corrupting the
remaining bits of the register when a write access that is not
word-sized occurs in the memory mapped I/O area. This could
happen e.g. when a bit field is byte-sized and byte-aligned.
