[at32] add support f45x series

pyocd.yaml

@@ -4,6 +4,7 @@ pack:
   - ./packs/ARM.Musca_B1_BSP.1.1.0-small.pack
   - ./packs/ArteryTek.AT32A403A_DFP.2.0.5.pack
   - ./packs/ArteryTek.AT32A423_DFP.2.0.0.pack
+  - ./packs/ArteryTek.AT32F45x_DFP.2.0.0.pack
   - ./packs/ArteryTek.AT32F402_405_DFP.2.0.2.pack
   - ./packs/ArteryTek.AT32F403A_407_DFP.2.1.9.pack
   - ./packs/ArteryTek.AT32F413_DFP.2.0.7.pack