[bt_uart.c] fix bug:cant receive data

[W-M-R]

Summary

rootcause: in btuart_rxwork, read data in blocking mode and btuart_read do three times, maybe remote send some packets one time,so it wont read the sencond packets.

Impact

No

Testing

No

[nuttxpr]

[Experimental Bot, please feedback here]

No, this PR does not meet the NuttX requirements.

Missing Information:

• Summary:
  • Lacks a clear explanation of the change's purpose (fix, update, feature).
  • Does not describe the functional code being changed.
  • Provides a vague description of the change's mechanics.
  • Omits issue references.
• Impact:
  • Provides a simple "No" for all impact categories without justification. Some impacts (e.g., hardware, compatibility) are likely relevant given the code involved.
• Testing:
  • Simply states "No" for testing.
  • Does not list build hosts or target environments used for verification.
  • Omits testing logs before and after the change.

To meet NuttX PR requirements, the author needs to:

1. Expand the Summary:
   • Clearly state the PR's purpose.
   • Identify the specific code sections being modified.
   • Explain how the change addresses the "rootcause" and its effects.
   • Include relevant issue references.
2. Thoroughly Address Impact:
   • Analyze and justify the impact (or lack thereof) for each category.
   • Provide specific details if an impact exists.
3. Provide Testing Details:
   • Confirm testing on local setup and list specific build host and target details.
   • Include relevant testing logs from before and after the change to demonstrate the issue and the fix.

[GUIDINGLI]

close, use PR: #14224