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.c b/lib/efi_selftest/efi_selftest.c
index 39ee2ed..3da34b1 100644
--- a/lib/efi_selftest/efi_selftest.c
+++ b/lib/efi_selftest/efi_selftest.c
@@ -75,7 +75,7 @@
  *
  * @test	the test to be executed
  * @failures	counter that will be incremented if a failure occurs
- * @return	EFI_ST_SUCCESS for success
+ * Return:	EFI_ST_SUCCESS for success
  */
 static int setup(struct efi_unit_test *test, unsigned int *failures)
 {
@@ -100,7 +100,7 @@
  *
  * @test	the test to be executed
  * @failures	counter that will be incremented if a failure occurs
- * @return	EFI_ST_SUCCESS for success
+ * Return:	EFI_ST_SUCCESS for success
  */
 static int execute(struct efi_unit_test *test, unsigned int *failures)
 {
@@ -125,7 +125,7 @@
  *
  * @test	the test to be torn down
  * @failures	counter that will be incremented if a failure occurs
- * @return	EFI_ST_SUCCESS for success
+ * Return:	EFI_ST_SUCCESS for success
  */
 static int teardown(struct efi_unit_test *test, unsigned int *failures)
 {