linux: add upstream patches, backported from 3.8.7

Signed-off-by: Stephan Raue <stephan@openelec.tv>
dvb-firmware: update to dvb-firmware-0.0.33
linux: add network related upstream patches, backported from 3.8.7

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