docs(changelog): update some scope for release note

To ease release note preparation, add some missing scope in the
changelog.yaml file.

Change-Id: I9426cf7b90455a487c4653c3fc9a6a718c13df7b
Signed-off-by: Yann Gautier <yann.gautier@st.com>

changelog.yaml

@@ -252,6 +252,7 @@ subsections:
 
                 deprecated:
                   - board/rdn2
+                  - rdfremont
 
             deprecated:
               - neoverse
@@ -272,6 +273,9 @@ subsections:
           - title: Corstone-1000
             scope: corstone-1000
 
+            deprecated:
+              - corstone1000
+
           - title: Automotive RD
             scope: automotive_rd
 
@@ -302,6 +306,9 @@ subsections:
           - title: HiKey960
             scope: hikey960
 
+          - title: Poplar
+            scope: poplar
+
       - title: Intel
         scope: intel
 
@@ -616,6 +623,9 @@ subsections:
           - title: RK3328
             scope: rk3328
 
+          - title: RK3588
+            scope: rk3588
+
       - title: Socionext
         scope: socionext
 
@@ -734,6 +744,9 @@ subsections:
   - title: Services
     scope: services
 
+    deprecated:
+      - std_svc
+
     subsections:
       - title: FF-A
         scope: ff-a