updated docs

Signed-off-by: Nwusongqing <wusongqing@huawei.com>

en/device-dev/faqs/Readme-EN.md

 # FAQs
 
--   [Overview of FAQs](overview-of-faqs.md)
--   [Environment Setup](environment-setup.md)
--   [Compilation and Building Subsystem](compilation-and-building-subsystem.md)
--   [Burning](burning.md)
--   [Kernel](kernel.md)
--   [Porting](porting.md)
--   [Startup and Recovery](startup-and-recovery.md)
--   [System Applications](system-applications.md)
+-   [Overview of FAQs](faqs-overview.md)
+-   [Environment Setup](faqs-environment-setup.md)
+-   [Compilation and Building Subsystem](faqs-building)
+-   [Burning](faqs-burning.md)
+-   [Kernel](faqs-kernel.md)
+-   [Porting](faqs-porting)
+-   [Startup and Recovery](faqs-startup-and-recovery.md)
+-   [System Applications](faqs-system-applications)
 

en/device-dev/subsystems/subsys-toolchain.md

@@ -2,6 +2,6 @@
 
 -   **[bytrace Usage Guidelines](subsys-toolchain-bytrace-guide.md)**  
 
--   **[hdc\_std Usage Guidelines](subsys_toolchain_hdc_guide.md)**  
+-   **[hdc\_std Usage Guidelines](subsys-toolchain-hdc-guide.md)**  
 
 

en/device-dev/subsystems/subsys-utils.md

 # Utils<a name="EN-US_TOPIC_0000001157319385"></a>
 
--   **[Utils Overview](subsys_utils_overview.md)**  
+-   **[Utils Overview](subsys-utils-overview.md)**  
 
--   **[Utils Development Guidelines](subsys_utils_guide.md)**  
+-   **[Utils Development Guidelines](subsys-utils-guide.md)**  
 
--   **[Utils FAQ](subsys_utils_faqs.md)**  
+-   **[Utils FAQ](subsys-utils-faqs.md)**  
 
 

zh-cn/device-dev/faqs/Readme-CN.md

 # FAQs
 
 -   [常见问题概述](faqs-overview.md)
--   [环境搭建常见问题](faqs-environment-building.md)
+-   [环境搭建常见问题](faqs-environment-setup.md)
 -   [编译构建子系统常见问题](faqs-building.md)
 -   [烧录常见问题](faqs-burning.md)
 -   [内核常见问题](faqs-kernel.md)
--   [移植常见问题](faqs-planting.md)
--   [启动恢复常见问题](faqs-init.md)
+-   [移植常见问题](faqs-porting.md)
+-   [启动恢复常见问题](faqs-startup-and-recovery.md)
 -   [系统应用常见问题](faqs-system-applications.md)