projects/Generic_OSS/linux: enable Radeon DPM support per default

Signed-off-by: Stephan Raue <stephan@openelec.tv>
Mesa: add support to build latest Mesa-master

Signed-off-by: Stephan Raue <stephan@openelec.tv>
Mesa: add vdpau_interop patches

Signed-off-by: Stephan Raue <stephan@openelec.tv>
Mesa: build with VDPAU support if requested, rename $MESA_VDPAU_SUPPORT to $VDPAU

Signed-off-by: Stephan Raue <stephan@openelec.tv>
projects/Generic_OSS: build with Mesa-master

Signed-off-by: Stephan Raue <stephan@openelec.tv>
projects/Generic_OSS: add patch make interlaced videos a bit better (temp)

Signed-off-by: Stephan Raue <stephan@openelec.tv>
Merge branch 'master' of github.com:OpenELEC/OpenELEC.tv