Changes for new NOOBS multi partition booting from gsh

See: https://github.com/raspberrypi/linux/commit/63b69a8806ce1890711ff55280c90673ea415933
Fix for changes for new NOOBS multi partition booting from gsh

See: https://github.com/raspberrypi/linux/commit/63b69a8806ce1890711ff55280c90673ea415933
firmware: add OMX helpers for DRC
raspicam: Adding --link option for latest complete timelapse frame
See: https://github.com/raspberrypi/userland/pull/71
linux: Enable CONFIG_COMPACTION and move from SLAB to SLUB allocator
firmware: fix uninitialised variable that could cause camera to hang on first use
firmware: Fix for out of sync hdmi audio after pause
firmware: Improved locking to hdmi display framerate