[bsp] Fix frdm-k64f compiling issue

bsp/frdm-k64f/applications/startup.c

@@ -15,7 +15,6 @@
 #include <rthw.h>
 #include <rtthread.h>
 
-#include <MK64F12.H>
 #include <board.h>
 
 /**

bsp/frdm-k64f/board/board.c

@@ -15,7 +15,6 @@
 #include <rthw.h>
 #include <rtthread.h>
 
-#include <MK64F12.H>
 #include "board.h"
 
 #include "drv_uart.h"

bsp/frdm-k64f/board/board.h

@@ -16,7 +16,7 @@
 #ifndef __BOARD_H__
 #define __BOARD_H__
 
-#include <MK64F12.H>
+#include <MK64F12.h>
 
 
 /* board configuration */

bsp/frdm-k64f/board/drv_uart.h

@@ -19,7 +19,7 @@
 #include <rtthread.h>
 #include <rtdevice.h>
 
-#include <MK64F12.H>
+#include <MK64F12.h>
 
 #include <drivers/serial.h>
 

bsp/frdm-k64f/board/led.c

@@ -12,7 +12,7 @@
  *
  */
 
-#include <MK64F12.H>
+#include <MK64F12.h>
 #include "led.h"
 
 const rt_uint32_t led_mask[] = {1 << 21, 1 << 22, 1 << 26};