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/smem.h b/include/smem.h
index 83da9e1..b19c534 100644
--- a/include/smem.h
+++ b/include/smem.h
@@ -57,7 +57,7 @@
  * @host:	remote processor id, or -1
  * @item:	smem item handle
  * @size:	number of bytes to be allocated
- * @return 0 if OK, -ve on error
+ * Return: 0 if OK, -ve on error
  *
  * Allocate space for a given smem item of size @size, given that the item is
  * not yet allocated.
@@ -69,7 +69,7 @@
  * @host:	the remote processor, or -1 for all processors.
  * @item:	smem item handle
  * @size:	pointer to be filled out with size of the item
- * @return	pointer on success, NULL on error
+ * Return:	pointer on success, NULL on error
  *
  * Looks up smem item and returns pointer to it. Size of smem
  * item is returned in @size.
@@ -80,7 +80,7 @@
  * smem_get_free_space() - retrieve amount of free space in a partition
  * @host:	the remote processor identifying a partition, or -1
  *			for all processors.
- * @return	size in bytes, -ve on error
+ * Return:	size in bytes, -ve on error
  *
  * To be used by smem clients as a quick way to determine if any new
  * allocations has been made.