!653 PWM驱动开发文档细节修改

Merge pull request !653 from tianyangpeng/master

zh-cn/device-dev/driver/driver-platform-pwm-develop.md

@@ -213,7 +213,7 @@ PWM模块适配HDF框架的三个环节是配置属性文件，实例化驱动
       (void)obj;
       return HDF_SUCCESS;
     }
-    //挂载init的
+    
     static int32_t HdfPwmInit(struct HdfDeviceObject *obj)
     {
       int ret;