[PATCH -next] Documentation: devres: add missing IO helper

[Yang Yingliang <yangyingliang@xxxxxxxxxx>]

Add missing devm_request_free_mem_region() to devres.rst.
It's introduced by commit 0092908d16c6 ("mm: factor out a
devm_request_free_mem_region helper").

Signed-off-by: Yang Yingliang <yangyingliang@xxxxxxxxxx>
---
 Documentation/driver-api/driver-model/devres.rst | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/driver-api/driver-model/devres.rst b/Documentation/driver-api/driver-model/devres.rst
index 2895f9ea00c4..d709a7b79bb1 100644
--- a/Documentation/driver-api/driver-model/devres.rst
+++ b/Documentation/driver-api/driver-model/devres.rst
@@ -301,6 +301,7 @@ IO region
   devm_release_region()
   devm_release_resource()
   devm_request_mem_region()
+  devm_request_free_mem_region()
   devm_request_region()
   devm_request_resource()
 
-- 
2.25.1