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/net/octeontx2/cgx.h b/drivers/net/octeontx2/cgx.h
index f287692..b1f6f06 100644
--- a/drivers/net/octeontx2/cgx.h
+++ b/drivers/net/octeontx2/cgx.h
@@ -82,7 +82,7 @@
  *
  * @param instance	instance to find
  *
- * @return	pointer to lmac data structure or NULL if not found
+ * Return:	pointer to lmac data structure or NULL if not found
  */
 struct lmac *nix_get_cgx_lmac(int lmac_instance);