doc: Add BLE controller changes to 1.9 release notes

Signed-off-by: Carles Cufi <carles.cufi@nordicsemi.no>
diff --git a/doc/release-notes-1.9.rst b/doc/release-notes-1.9.rst
index 5823ec4..827b51f 100644
--- a/doc/release-notes-1.9.rst
+++ b/doc/release-notes-1.9.rst
@@ -79,6 +79,12 @@
 * IPSP net-app support: a simplified networking API reducing duplication
   of common tasks an application writer has to go through to connect
   to the network.
+* BLE controller qualification-ready, with all required tests passing
+* Controller-based privacy (including all optional features)
+* Extended Scanner Filter Policies support in the controller
+* Controller roles (Advertiser, Scanner, Master and Slave) separation in
+  source code, conditionally includable
+* Flash access cooperation with BLE radio activity
 
 Build and Infrastructure
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