uchcom.4: Add HARDWARE, makeover

[ziaee]

Summary

Tag spdx, improve document description for apropos, improve synopsis
for clarity and consistency, improve description to explain usage,
improve hardware for hardware release notes, mention the sysctl, xref
the application to use this driver, improve history.

Fixes: 1395712cab8e958 (add support for CH9102 and CH343)

[kevlo]

Looks good to me, thanks.

[carlavilla]

Approved, thank you for your hard work :)