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/mmc/mmc_private.h b/drivers/mmc/mmc_private.h
index a6cd250..b321237 100644
--- a/drivers/mmc/mmc_private.h
+++ b/drivers/mmc/mmc_private.h
@@ -91,7 +91,7 @@
 /**
  * mmc_get_next_devnum() - Get the next available MMC device number
  *
- * @return next available device number (0 = first), or -ve on error
+ * Return: next available device number (0 = first), or -ve on error
  */
 int mmc_get_next_devnum(void);
 
@@ -117,7 +117,7 @@
  *
  * @mmc:	MMC device
  * @part_num:	Hardware partition number
- * @return 0 if OK, -ve on error
+ * Return: 0 if OK, -ve on error
  */
 int mmc_switch_part(struct mmc *mmc, unsigned int part_num);
 
@@ -128,7 +128,7 @@
  * @set:	Unused
  * @index:	Cmdarg index
  * @value:	Cmdarg value
- * @return 0 if OK, -ve on error
+ * Return: 0 if OK, -ve on error
  */
 int mmc_switch(struct mmc *mmc, u8 set, u8 index, u8 value);