doc: replace @return by Return:

Sphinx expects Return: and not @return to indicate a return value.

find . -name '*.c' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;

find . -name '*.h' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
diff --git a/drivers/remoteproc/sandbox_testproc.c b/drivers/remoteproc/sandbox_testproc.c
index 6836eca..78b1081 100644
--- a/drivers/remoteproc/sandbox_testproc.c
+++ b/drivers/remoteproc/sandbox_testproc.c
@@ -308,7 +308,7 @@
  * @dev:	device to operate upon
  * @da:		device address
  * @size:	Size of the memory region @da is pointing to
- * @return converted virtual address
+ * Return: converted virtual address
  */
 static void *sandbox_testproc_device_to_virt(struct udevice *dev, ulong da,
 					     ulong size)