* hw/kdrive/ephyr/ephyrhostvideo.c,h:
(ephyrHostXVAdaptorHasPutVideo): detect if
host X has the PutVideo call.
(ephyrHostXVAdaptorHasPutStill): detect if
host X has the PutStill call
(ephyrHostXVAdaptorHasPutImage): detect if
host X has the PutImage call
* hw/kdrive/ephyr/ephyrvideo.c:
(ephyrXVPrivQueryHostAdaptors): make sure to create
atoms for attribute names otherwise subsequent
calls to get/set attribute from clients won't work.
(ephyrXVPrivSetAdaptorsHooks): don't hardwire advertising
of the PutImage call. Instead, advertise the calls advertised
by the host.