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/test/dm/acpi.h b/test/dm/acpi.h
index 535db56..c6636b8 100644
--- a/test/dm/acpi.h
+++ b/test/dm/acpi.h
@@ -17,7 +17,7 @@
  *
  * @ctxp: Returns allocated context
  * @size: Size to allocate in bytes
- * @return 0 if OK, -ENOMEM if out of memory
+ * Return: 0 if OK, -ENOMEM if out of memory
  */
 int acpi_test_alloc_context_size(struct acpi_ctx **ctxp, int size);
 
@@ -25,7 +25,7 @@
  * acpi_test_get_length() - decode a three-byte length field
  *
  * @ptr: Length encoded as per ACPI
- * @return decoded length, or -EINVAL on error
+ * Return: decoded length, or -EINVAL on error
  */
 int acpi_test_get_length(u8 *ptr);