[PR] drivers/syslog: let syslog_write() return the maximum bytes writen through a channel [nuttx]

[via GitHub]

wangchdo opened a new pull request, #16982:
URL: https://github.com/apache/nuttx/pull/16982

   
    In current implementation, when do syslog_write(), there may
    be more than one channel, the syslog will iterate each channel,
    but only return the bytes writen through the last channel, the
    better way should be returning the maximum bytes writen
    through one channel.
   
   *Note: Please adhere to [Contributing 
Guidelines](https://github.com/apache/nuttx/blob/master/CONTRIBUTING.md).*
   
   ## Summary
   
   Let syslog_write() return the maximum bytes writen through a channel, when 
have multiple syslog channels
   
   ## Impact
   
   Fix syslog_write() return value issue when there are multiple syslog channels
   
   ## Testing
   
   ostest will cover the testing of this update
   
   
   


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