Fix strict-overflow warning when compiling with gcc >= 12

[angmolin]

Describe the PR
This PR solves a problem with strict-overflow when compiling the tinyusb examples with gcc >=12. Here is the output:

tinyusb/src/class/audio/audio_device.c:1568:23: error: assuming pointer wraparound does not occur when comparing P +- C1 with P +- C2 [-Werror=strict-overflow]
 1568 |         while (p_desc < p_desc_end)
      |                ~~~~~~~^~~~~~~~~~~~
compilation terminated due to -Wfatal-errors.
cc1: all warnings being treated as errors

This PR solves issue #2365

Additional context
Compiled from Rocky Linux 9

[HiFiPhile]

Thanks for the pr, could you add a comment?

[angmolin]

Hello, I've just added a comment to the PR to explain why I changed the condition. Thank you for feedback.