projects/*/linux: add P54 network driver

Signed-off-by: Stephan Raue <stephan@openelec.tv>
wlan-firmware: update to wlan-firmware-0.0.11

Signed-off-by: Stephan Raue <stephan@openelec.tv>
busybox: increase min_free_kbytes size

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

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