drm/vc4: hdmi: Add all the vc5 HDMI registers into the debugfs dumps

The vc5 HDMI registers hadn't been added into the debugfs
register sets, therefore weren't dumped on request.
Add them in.

Fixes: 83239891 ("drm/vc4: hdmi: Support the BCM2711 HDMI controllers")
Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Link: https://lore.kernel.org/r/20220613144800.326124-19-maxime@cerno.tech


Signed-off-by: Maxime Ripard <maxime@cerno.tech>