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/include/handoff.h b/include/handoff.h
index 070a79c..0104b83 100644
--- a/include/handoff.h
+++ b/include/handoff.h
@@ -38,7 +38,7 @@
  * write_spl_handoff().
  *
  * @ho: Handoff area to fill in
- * @return 0 if OK, -ve on error
+ * Return: 0 if OK, -ve on error
  */
 int handoff_arch_save(struct spl_handoff *ho);