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/spi_flash.h b/include/spi_flash.h
index 4566fea..d33d0dd 100644
--- a/include/spi_flash.h
+++ b/include/spi_flash.h
@@ -47,7 +47,7 @@
  * @offset:	Offset into device in bytes to read from
  * @len:	Number of bytes to read
  * @buf:	Buffer to put the data that is read
- * @return 0 if OK, -ve on error
+ * Return: 0 if OK, -ve on error
  */
 int spi_flash_read_dm(struct udevice *dev, u32 offset, size_t len, void *buf);
 
@@ -58,7 +58,7 @@
  * @offset:	Offset into device in bytes to write to
  * @len:	Number of bytes to write
  * @buf:	Buffer containing bytes to write
- * @return 0 if OK, -ve on error
+ * Return: 0 if OK, -ve on error
  */
 int spi_flash_write_dm(struct udevice *dev, u32 offset, size_t len,
 		       const void *buf);
@@ -71,7 +71,7 @@
  * @dev:	SPI flash device
  * @offset:	Offset into device in bytes to start erasing
  * @len:	Number of bytes to erase
- * @return 0 if OK, -ve on error
+ * Return: 0 if OK, -ve on error
  */
 int spi_flash_erase_dm(struct udevice *dev, u32 offset, size_t len);
 
@@ -83,7 +83,7 @@
  * defined.
  *
  * @dev:	SPI flash device
- * @return 0 if no region is write-protected, 1 if a region is
+ * Return: 0 if no region is write-protected, 1 if a region is
  *	write-protected, -ENOSYS if the driver does not implement this,
  *	other -ve value on error
  */
@@ -97,7 +97,7 @@
  * do this, typically with of-platdata
  *
  * @dev: SPI-flash device to probe
- * @return 0 if OK, -ve on error
+ * Return: 0 if OK, -ve on error
  */
 int spi_flash_std_probe(struct udevice *dev);