htm: Toggle debug bit so trace actually starts
htm: Toggle debug bit so trace actually starts

Without this the trace doesn't actually run.

In the past, it was only running once the user did another htm command
which toggled this bit during the probe.

Signed-off-by: Michael Neuling <7b0ab45a730e48a69239010b5b8fe5fa4e8eaac6@neuling.org>

open-power/pdbg,open-power/pdbg,open-power/pdbg