merge #5571: add wch chip.

Author: charlown

.github/workflows/action.yml

@@ -144,6 +144,8 @@ jobs:
          - {RTT_BSP: "stm32/stm32mp157a-st-ev1", RTT_TOOL_CHAIN: "sourcery-arm"}
          - {RTT_BSP: "stm32/stm32u575-st-nucleo", RTT_TOOL_CHAIN: "sourcery-arm"}
          - {RTT_BSP: "stm32/stm32wb55-st-nucleo", RTT_TOOL_CHAIN: "sourcery-arm"}
+         - {RTT_BSP: "wch/arm/ch32f103c8-core", RTT_TOOL_CHAIN: "sourcery-arm"}
+         - {RTT_BSP: "wch/arm/ch32f203r-evt", RTT_TOOL_CHAIN: "sourcery-arm"}
          - {RTT_BSP: "swm320", RTT_TOOL_CHAIN: "sourcery-arm"}
          - {RTT_BSP: "swm320-lq100", RTT_TOOL_CHAIN: "sourcery-arm"}
          - {RTT_BSP: "beaglebone", RTT_TOOL_CHAIN: "sourcery-arm"}