fs_heap: add memalign interface

So the share memory can use it to malloc aligned memory.
Signed-off-by: xuxingliang <[email protected]>

Author: XuNeo

fs/fs_heap.c

@@ -68,6 +68,11 @@ FAR void *fs_heap_realloc(FAR void *oldmem, size_t size)
   return mm_realloc(g_fs_heap, oldmem, size);
 }
 
+FAR void *fs_heap_memalign(size_t alignment, size_t size)
+{
+  return mm_memalign(g_fs_heap, alignment, size);
+}
+
 void fs_heap_free(FAR void *mem)
 {
   mm_free(g_fs_heap, mem);

fs/fs_heap.h

@@ -43,6 +43,7 @@ FAR void *fs_heap_zalloc(size_t size) malloc_like1(1);
 FAR void *fs_heap_malloc(size_t size) malloc_like1(1);
 size_t    fs_heap_malloc_size(FAR void *mem);
 FAR void *fs_heap_realloc(FAR void *oldmem, size_t size) realloc_like(2);
+FAR void *fs_heap_memalign(size_t alignment, size_t size) malloc_like1(3);
 void      fs_heap_free(FAR void *mem);
 FAR char *fs_heap_strdup(FAR const char *s) malloc_like;
 FAR char *fs_heap_strndup(FAR const char *s, size_t size) malloc_like;
@@ -54,6 +55,7 @@ int       fs_heap_asprintf(FAR char **strp, FAR const char *fmt, ...)
 #  define fs_heap_malloc       kmm_malloc
 #  define fs_heap_malloc_size  kmm_malloc_size
 #  define fs_heap_realloc      kmm_realloc
+#  define fs_heap_memalign     kmm_memalign
 #  define fs_heap_free         kmm_free
 #  define fs_heap_strdup       strdup
 #  define fs_heap_strndup      strndup