radv: Add option to print errors even in optimized builds.

radv: Add option to print errors even in optimized builds.

Errors are not that common of a case so we can eat a slight perf
hit in having to call a function and do a runtime check.

In turn this makes debugging random errors happening for end users
easier, because they don't have to have a debug build on hand.

Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>