The implicit promise of heap_alloc_caps() and friends is that the memory it
returns is fit for the purpose as requested in the caps field. Before
this commit, that did not happen; e.g. DMA-capable memory wass returned
from a correct region, but not aligned/sized to something the DMA subsystem
can handle.
This commit adds an API to the esp_mm component that is then used by the
heap component to adjust allocation alignment, caps and size dependent on
the hardware requirement of the requested allocation caps.
ESP_CACHE_MSYNC_FLAG_DIR_C2M: From cache to memory
ESP_CACHE_MSYNC_FLAG_DIR_M2C: From memory to cache
By default, if no direction flag is set, it will fallback C2M direction.
For M2C direction, now this API will do an invalidation.
