stm32f1: Modified the Flash routines to work with GD32VF103 parts too

src/target/stm32f1.c

@@ -41,6 +41,7 @@
 #include "target.h"
 #include "target_internal.h"
 #include "cortexm.h"
+#include "jep106.h"
 
 static bool stm32f1_cmd_option(target_s *target, int argc, const char **argv);
 
@@ -640,7 +641,11 @@ static bool stm32f1_flash_write(target_flash_s *flash, target_addr_t dest, const
 		stm32f1_flash_clear_eop(target, FLASH_BANK1_OFFSET);
 
 		target_mem_write32(target, FLASH_CR, FLASH_CR_PG);
-		cortexm_mem_write_sized(target, dest, src, offset, ALIGN_16BIT);
+		/* Use the target API instead of a direct Cortex-M call for GD32VF103 parts */
+		if (target->designer_code == JEP106_MANUFACTURER_RV_GIGADEVICE && target->cpuid == 0x80000022U)
+			target_mem_write(target, dest, src, offset);
+		else
+			cortexm_mem_write_sized(target, dest, src, offset, ALIGN_16BIT);
 
 		/* Wait for completion or an error */
 		if (!stm32f1_flash_busy_wait(target, FLASH_BANK1_OFFSET, NULL))
@@ -654,7 +659,11 @@ static bool stm32f1_flash_write(target_flash_s *flash, target_addr_t dest, const
 		stm32f1_flash_clear_eop(target, FLASH_BANK2_OFFSET);
 
 		target_mem_write32(target, FLASH_CR + FLASH_BANK2_OFFSET, FLASH_CR_PG);
-		cortexm_mem_write_sized(target, dest + offset, data + offset, remainder, ALIGN_16BIT);
+		/* Use the target API instead of a direct Cortex-M call for GD32VF103 parts */
+		if (target->designer_code == JEP106_MANUFACTURER_RV_GIGADEVICE && target->cpuid == 0x80000022U)
+			target_mem_write(target, dest + offset, data + offset, remainder);
+		else
+			cortexm_mem_write_sized(target, dest + offset, data + offset, remainder, ALIGN_16BIT);
 
 		/* Wait for completion or an error */
 		if (!stm32f1_flash_busy_wait(target, FLASH_BANK2_OFFSET, NULL))