This commit aims to place in the IRAM section only the functions that
are relevent for performance instead of placing the entire content of
multi_heap.c, mullti_heap_poisoning.c and tlsf.c in the IRAM.
heap: ported tlsf allocator into multi heap
heap_host_tests: added tlsf allocator into host test
heap_host_test: update freebytes after using free
heap_tests: tlsf now passing on host tests without poisoning
multi_heap: added support for memalign using tlsf implementation
heap_caps: removed heap_caps_aligned_free
heap/test: fixed broken aligned alloc test build
heap: added poisoning pattern when blocks are being merged
heap/tests: added timing tests for memory allocation
heap: reduced tlsf structure overhead
heap/tlsf: made all short functions inside of tlsf module as inline to improve timings
heap: moved tlsf heap routines outside of flash memory
newlib: linked multiheap memalign with newlib memalign function
heap: moved block member functions to a separate file so multi_heap can use the functions
heap/test: improved the tlsf timing test
heap/test: added memalign on aligned alloc tests
heap: moved tlsf configuration constants to a separated file
heap: added random allocations test with timings
heap: modified the calculation of heap free bytes
heap: make aligned free true deprecated functions and update their documentation
heap: add extra assert after successive mallocs on small allocation host test
heap: remove legacy aligned alloc implementation.
performance: added malloc and free time performance default values
