Radeon: More PLL finetuning
xbmc: update to xbmc-13-4540f80

Signed-off-by: Stephan Raue <stephan@openelec.tv>
xorg-server: remove old script

Signed-off-by: Stephan Raue <stephan@openelec.tv>
xorg-server: add support for 4k output

Signed-off-by: Stephan Raue <stephan@openelec.tv>