r600g: fix up shader out misc stuff for copy shader

r600g: fix up shader out misc stuff for copy shader

set the correct values so the misc out register is setup correctly
for the copy shader.

This also updates the state for the gs copy shader so the hw
gets programmed correctly.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>