libnl: update to libnl-3.2.21

Signed-off-by: Stephan Raue <stephan@openelec.tv>
xf86-video-intel: update to xf86-video-intel-2.21.2

Signed-off-by: Stephan Raue <stephan@openelec.tv>
projects/RPi: update RPi patches

Signed-off-by: Stephan Raue <stephan@openelec.tv>
bcm2835-driver: update to bcm2835-driver-4697c2b

Signed-off-by: Stephan Raue <stephan@openelec.tv>
bcm2835-bootloader: update to bcm2835-bootloader-4697c2b

Signed-off-by: Stephan Raue <stephan@openelec.tv>
projects/RPi/options: optimize for size

Signed-off-by: Stephan Raue <stephan@openelec.tv>
bcm2835-bootloader: use again 128MB GPU mem as default for 256MB RPi's

Signed-off-by: Stephan Raue <stephan@openelec.tv>
Merge remote-tracking branch 'upstream/master'