build(changelog): add new scopes for NXP driver

Add new scope for NXP DDR drivers and GIC drivers.

Signed-off-by: Jiafei Pan <Jiafei.Pan@nxp.com>
Change-Id: I8ff4d203c474593fe2cff846e0040fc8651b20b6
diff --git a/changelog.yaml b/changelog.yaml
index fa42e96..f1cce7b 100644
--- a/changelog.yaml
+++ b/changelog.yaml
@@ -748,6 +748,12 @@
           - title: NXP Crypto
             scope: nxp-crypto
 
+          - title: DDR
+            scope: nxp-ddr
+
+          - title: GIC
+            scope: nxp-gic
+
       - title: Renesas
         scope: renesas-drivers