dma-buf: heaps: Use _IOCTL_ for userspace IOCTL identifier

This is more consistent with the DMA and DRM frameworks convention. This
patch is only a name change, no logic is changed.

Signed-off-by: Andrew F. Davis <[e-mail]>
Acked-by: John Stultz <[e-mail]>
Signed-off-by: Sumit Semwal <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/dma-buf/dma-heap.c

···
 }
 
 unsigned int dma_heap_ioctl_cmds[] = {
-	DMA_HEAP_IOC_ALLOC,
+	DMA_HEAP_IOCTL_ALLOC,
 };
 
 static long dma_heap_ioctl(struct file *file, unsigned int ucmd,
···
 		memset(kdata + in_size, 0, ksize - in_size);
 
 	switch (kcmd) {
-	case DMA_HEAP_IOC_ALLOC:
+	case DMA_HEAP_IOCTL_ALLOC:
 		ret = dma_heap_ioctl_allocate(file, kdata);
 		break;
 	default:

include/uapi/linux/dma-heap.h

···
 #define DMA_HEAP_IOC_MAGIC		'H'
 
 /**
- * DOC: DMA_HEAP_IOC_ALLOC - allocate memory from pool
+ * DOC: DMA_HEAP_IOCTL_ALLOC - allocate memory from pool
  *
  * Takes a dma_heap_allocation_data struct and returns it with the fd field
  * populated with the dmabuf handle of the allocation.
  */
-#define DMA_HEAP_IOC_ALLOC	_IOWR(DMA_HEAP_IOC_MAGIC, 0x0,\
+#define DMA_HEAP_IOCTL_ALLOC	_IOWR(DMA_HEAP_IOC_MAGIC, 0x0,\
 				      struct dma_heap_allocation_data)
 
 #endif /* _UAPI_LINUX_DMABUF_POOL_H */

tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c

···
 	if (!dmabuf_fd)
 		return -EINVAL;
 
-	ret = ioctl(fd, DMA_HEAP_IOC_ALLOC, &data);
+	ret = ioctl(fd, DMA_HEAP_IOCTL_ALLOC, &data);
 	if (ret < 0)
 		return ret;
 	*dmabuf_fd = (int)data.fd;