kernel: Add support for red/blue swapped framebuffer
See: https://github.com/raspberrypi/linux/issues/514

firmware: Fix crash that could occur when passthrough dts packet is short

firmware: Set validity bit for audio passthrough formats to avoid noise when unsupported by tv/receiver

firmware: Increase allowed clock drift from 50ms to 100ms to avoid video stutters

userland: Updates to raspicam