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

drm/nouveau: 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.

Conveniently, this also removes the need to use edid_blob_ptr.

v2: Reverse a backwards if condition (Ilia)

Cc: Karol Herbst <kherbst@redhat.com>
Cc: Lyude Paul <lyude@redhat.com>
Cc: Danilo Krummrich <dakr@redhat.com>
Cc: nouveau@lists.freedesktop.org
Reviewed-by: Lyude Paul <lyude@redhat.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/aa45875200705205ae101c409fc2bba03b631a5e.1715353572.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>