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/tpm2_tis_spi.c b/drivers/tpm/tpm2_tis_spi.c
index 58b6f33..de9cf8f 100644
--- a/drivers/tpm/tpm2_tis_spi.c
+++ b/drivers/tpm/tpm2_tis_spi.c
@@ -60,7 +60,7 @@
  * NOTE: TPM is big-endian for multi-byte values. Multi-byte
  * values have to be swapped.
  *
- * @return -EIO on error, 0 on success.
+ * Return: -EIO on error, 0 on success.
  */
 static int tpm_tis_spi_xfer(struct udevice *dev, u32 addr, const u8 *out,
 			    u8 *in, u16 len)