drm/vc4: hvs: protect drm_print_regset32()

In vc4_hvs_dump_state() potentially freed resources are protected from
being accessed with drm_dev_enter()/drm_dev_exit().

Also include drm_print_regset32() in the protected section, since
drm_print_regset32() does access memory that is typically mapped via
devm_* calls.

Fixes: 969cfae1 ("drm/vc4: hvs: Protect device resources after removal")
Signed-off-by: Danilo Krummrich <dakr@redhat.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20220824161327.330627-5-dakr@redhat.com