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/acpi.c b/drivers/core/acpi.c
index 2176d8b..e988a65 100644
--- a/drivers/core/acpi.c
+++ b/drivers/core/acpi.c
@@ -109,7 +109,7 @@
  * @dev: Device that generated the data
  * @type: Table type it refers to
  * @start: The start of the data (the end is obtained from ctx->current)
- * @return 0 if OK, -ENOSPC if too many items, -ENOMEM if out of memory
+ * Return: 0 if OK, -ENOSPC if too many items, -ENOMEM if out of memory
  */
 static int acpi_add_item(struct acpi_ctx *ctx, struct udevice *dev,
 			 enum gen_type_t type, void *start)
@@ -179,7 +179,7 @@
  * @start: Start position to put the sorted items. The items will follow each
  *	other in sorted order
  * @type: Type of items to sort
- * @return 0 if OK, -ve on error
+ * Return: 0 if OK, -ve on error
  */
 static int sort_acpi_item_type(struct acpi_ctx *ctx, void *start,
 			       enum gen_type_t type)