due to mbedtls version skew, some macros need to be provided. The espressif common-hal implementation is no longer needed. The copyright of hashlib/__init__.h comes from micropython extmod/modhashlib.c where I found the macro definitions.
.. many platforms can use mbedtls to implement hashlib. Compile-tested with pico-w. Tested on feather rp2040 dvi.
