v3d: handle ldtlb and ldtlbu signals during disassembly

v3d: handle ldtlb and ldtlbu signals during disassembly

We already have code to print these signals but the early return in the code
that checks if any signals are present present was missing the checks for them,
so it would skip printing them unless they were paired with other signals.

Reviewed-by: Eric Anholt <eric@anholt.net>