use stock core_riscv.h for ch32 v2 v3

src/portable/st/stm32_fsdev/fsdev_ch32.h

@@ -36,13 +36,23 @@
 
 #include "common/tusb_compiler.h"
 
+// https://github.com/openwch/ch32v307/pull/90
+// https://github.com/openwch/ch32v20x/pull/12
+#ifdef __GNUC__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wstrict-prototypes"
+#endif
+
 #if CFG_TUSB_MCU == OPT_MCU_CH32V20X
   #include <ch32v20x.h>
-
 #elif CFG_TUSB_MCU == OPT_MCU_CH32F20X
   #include <ch32f20x.h>
 #endif
 
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif
+
 #define FSDEV_PMA_SIZE (512u)
 
 // volatile 32-bit aligned

src/portable/wch/ch32_usbfs_reg.h

@@ -28,6 +28,13 @@
 #ifndef USB_CH32_USBFS_REG_H
 #define USB_CH32_USBFS_REG_H
 
+// https://github.com/openwch/ch32v307/pull/90
+// https://github.com/openwch/ch32v20x/pull/12
+#ifdef __GNUC__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wstrict-prototypes"
+#endif
+
 #if CFG_TUSB_MCU == OPT_MCU_CH32V307
   #include <ch32v30x.h>
   #define USBHD_IRQn OTG_FS_IRQn
@@ -39,6 +46,10 @@
   #include <ch32f20x.h>
 #endif
 
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif
+
 // CTRL
 #define USBFS_CTRL_DMA_EN    (1 << 0)
 #define USBFS_CTRL_CLR_ALL   (1 << 1)

src/portable/wch/ch32_usbhs_reg.h

@@ -28,12 +28,24 @@
 #ifndef USB_CH32_USBHS_REG_H
 #define USB_CH32_USBHS_REG_H
 
+// https://github.com/openwch/ch32v307/pull/90
+// https://github.com/openwch/ch32v20x/pull/12
+#ifdef __GNUC__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wstrict-prototypes"
+#endif
+
 #if CFG_TUSB_MCU == OPT_MCU_CH32V307
   #include <ch32v30x.h>
 #elif CFG_TUSB_MCU == OPT_MCU_CH32F20X
   #include <ch32f20x.h>
 #endif
 
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif
+
+
 /******************* GLOBAL ******************/
 
 // USB CONTROL