- The declaration is moved to esp_rom/include/esp32c2/rom/tlsf.h.
- multi_heap_poisoning.h now includes rom/tlsf.h instead of declaring
tlsf_poison_fill_pfunc_set().
Note: If more targets will support an implementation of the TLSF in ROM,
esp_rom will be extended with new headers in the respective target directories
but multi_heap_poisoning.h will remain unchanged.
