drm/radeon: convert to using is_hdmi and has_audio from display info

Prefer the parsed results for is_hdmi and has_audio in display info over
calling drm_detect_hdmi_monitor() and drm_detect_monitor_audio(),
respectively.

Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Christian König <christian.koenig@amd.com>
Cc: Pan
Cc: amd-gfx@lists.freedesktop.org
Reviewed-by: Robert Foss <rfoss@kernel.org>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/c4dfde81b98a4e938ef1e253b05550cad96e49be.1715353572.git.jani.nikula@intel.com


Signed-off-by: Jani Nikula <jani.nikula@intel.com>