Merge pull request #7 from ruanqiuqiu/fix-stm32f4-headerfile

fix stm32f4 drv_sdio.h and drv_pwm.c #include <drivers/xx.h> to #include <rtdevice.h>

drivers/rtt/drv_pwm.c

@@ -13,7 +13,7 @@
 
 #ifdef RT_USING_PWM
 #include "drv_config.h"
-#include <drivers/rt_drv_pwm.h>
+#include "rtdevice.h"
 
 //#define DRV_DEBUG
 #define LOG_TAG             "drv.pwm"

drivers/rtt/include/drv_sdio.h

@@ -17,8 +17,6 @@
 #include <drv_common.h>
 #include "drv_dma.h"
 #include <string.h>
-#include <drivers/mmcsd_core.h>
-#include <drivers/sdio.h>
 
 #if defined(SOC_SERIES_STM32F1) || defined(SOC_SERIES_STM32F2) || defined(SOC_SERIES_STM32F4)
 #define SDCARD_INSTANCE_TYPE              SDIO_TypeDef