pw_malloc_freertos#
pw_malloc_freertos implements the pw_malloc facade using the FreeRTOS
heap functions. Wrapper functions for malloc, free, realloc and
calloc are provided that use the pvPortMalloc and vPortFree heap
functions from FreeRTOS. The start/end parameters to the pw_MallocInit
function are ignored by this backend as FreeRTOS defines its own heap variable
storage.