kernel: bump to 3.10.23

kernel: Add support for I2S/PCM audio devices
See: https://github.com/raspberrypi/linux/pull/461

firmware: OMX_ImageFilterDeInterlaceAdvanced: Explicitly set frame_interval
See: https://github.com/raspberrypi/firmware/issues/234

firmware: vdec3: Take advantage of explicit frame boundaries to reduce latency
See: https://github.com/raspberrypi/firmware/issues/232