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/core/device.c b/drivers/core/device.c
index d917d4e..901c1e2 100644
--- a/drivers/core/device.c
+++ b/drivers/core/device.c
@@ -346,7 +346,7 @@
  * device_alloc_priv() - Allocate priv/plat data required by the device
  *
  * @dev: Device to process
- * @return 0 if OK, -ENOMEM if out of memory
+ * Return: 0 if OK, -ENOMEM if out of memory
  */
 static int device_alloc_priv(struct udevice *dev)
 {