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/lib/efi_selftest/efi_selftest_fdt.c b/lib/efi_selftest/efi_selftest_fdt.c
index 412ba28..739f029 100644
--- a/lib/efi_selftest/efi_selftest_fdt.c
+++ b/lib/efi_selftest/efi_selftest_fdt.c
@@ -51,7 +51,7 @@
  *
  * @property	name of the property
  * @node	name of the node or NULL for root node
- * @return	value of the property
+ * Return:	value of the property
  */
 static char *get_property(const u16 *property, const u16 *node)
 {