heap: Refactor heap regions/capabilities out of FreeRTOS

Remove tagged heap API, rename caps_xxx to heap_caps_xxx

Also includes additional heap_caps_xxx inspection functions.

components/freertos/include/freertos/portable.h

@@ -136,29 +136,12 @@ extern "C" {
 	StackType_t *pxPortInitialiseStack( StackType_t *pxTopOfStack, TaskFunction_t pxCode, void *pvParameters ) PRIVILEGED_FUNCTION;
 #endif
 
-/* Used by heap_5.c. */
-typedef struct HeapRegion
-{
-	uint8_t *pucStartAddress;
-	size_t xSizeInBytes;
-} HeapRegion_t;
-
-/*
- * Used to define multiple heap regions for use by heap_5.c.  This function
- * must be called before any calls to pvPortMalloc() - not creating a task,
- * queue, semaphore, mutex, software timer, event group, etc. will result in
- * pvPortMalloc being called.
- *
- * pxHeapRegions passes in an array of HeapRegion_t structures - each of which
- * defines a region of memory that can be used as the heap.  The array is
- * terminated by a HeapRegions_t structure that has a size of 0.  The region
- * with the lowest start address must appear first in the array.
- */
-void vPortDefineHeapRegions( const HeapRegion_t * const pxHeapRegions );
-
-
 /*
  * Map to the memory management routines required for the port.
+ *
+ * Note that libc standard malloc/free are also available for
+ * non-FreeRTOS-specific code, and behave the same as
+ * pvPortMalloc()/vPortFree().
  */
 void *pvPortMalloc( size_t xSize ) PRIVILEGED_FUNCTION;
 void vPortFree( void *pv ) PRIVILEGED_FUNCTION;