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/video/rockchip/rk_vop.c b/drivers/video/rockchip/rk_vop.c
index fe05748..bc98ab6 100644
--- a/drivers/video/rockchip/rk_vop.c
+++ b/drivers/video/rockchip/rk_vop.c
@@ -238,7 +238,7 @@
  * @fbbase:	Frame buffer address
  * @ep_node:	Device tree node to process - this is the offset of an endpoint
  *		node within the VOP's 'port' list.
- * @return 0 if OK, -ve if something went wrong
+ * Return: 0 if OK, -ve if something went wrong
  */
 static int rk_display_init(struct udevice *dev, ulong fbbase, ofnode ep_node)
 {