modify system_ft32f0xx (#5703)

Author: FmdAE

bsp/ft32/libraries/FT32F0xx/CMSIS/FT32F0xx/source/system_ft32f0xx.c

@@ -20,7 +20,7 @@
   * @{
   */
 
-#include "FT32f0xx.h"
+#include "ft32f0xx.h"
 
 /**
   * @}