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/tpm/sandbox_common.h b/drivers/tpm/sandbox_common.h
index e822a20..f423c50 100644
--- a/drivers/tpm/sandbox_common.h
+++ b/drivers/tpm/sandbox_common.h
@@ -57,7 +57,7 @@
  * number used by the sandbox emulation.
  *
  * @index: Index to use (FIRMWARE_NV_INDEX, etc.)
- * @return associated space (enum sandbox_nv_space)
+ * Return: associated space (enum sandbox_nv_space)
  */
 int sb_tpm_index_to_seq(uint index);