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/lib/binman.c b/lib/binman.c
index 530df6a..cfe1e5f 100644
--- a/lib/binman.c
+++ b/lib/binman.c
@@ -37,7 +37,7 @@
  * depends on whether multiple-images is in use.
  *
  * @nodep: Returns the node found, on success
- * @return 0 if OK, , -EINVAL if there is no /binman node, -ECHILD if multiple
+ * Return: 0 if OK, , -EINVAL if there is no /binman node, -ECHILD if multiple
  * images are being used but the first image is not available
  */
 static int find_image_node(ofnode *nodep)