This adds the initial provider object and provider property
support to the randr dix code.
v2: destroy provider in screen close
v2.1: fix whitespace
v3: update for latest rev of protocol + renumber after 1.4 tearout.
v4: fix logic issue, thanks Samsagax on irc
v5: keithp's review: fix current_role, fix copyrights, fix master
reporting crtc/outputs.
v6: port to new randr interface, drop all set role bits for now
v7: drop devPrivate in provider, not needed, add BadMatch returns
for NULL SetProviderOffloadSink and SetProviderOutputSource, drop
the old typedef.
Reviewed-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
