wsi/display: fix monitor name in VK_KHR_get_display_properties2
Read the display name
field from the EDID, and fallback on the connector name if no name was found.
The fallback is important as embedded panels (eg. laptop screens) don't seem to advertise any monitor name.
This gives names like DELL P2314H
from the EDID or eDP-1
in the fallback.
/cc @keithp