fix compile of etna_emit.c

Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
'fix' compile

Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
uups

Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
add tiling functions
it compiles :) but there is lot to do left :(

Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>