[bsp][asm9260t] modify file name to lowercase.

bsp/asm9260t/platform/gpio.c

@@ -22,7 +22,7 @@
  * 2015-04-14     ArdaFu      first version
  */
  
-#include "ASM9260T.h"
+#include "asm9260t.h"
 #include "rtthread.h"
 
 void HW_SetPinMux(rt_uint8_t port, rt_uint8_t pin, rt_uint8_t mux_type)