fcplay: initial addition

fcplay: initial addition

This tool was forked from tinycompress cplay. The fork was required due
to this linking against libavcodec which is GPL. This uses libav APIs to
parse the compressed files and send the audio stream to compressed
device using tinycompress APIs

Right now it supports only playback on MP3 (no problems now not finding
sync word) and flac files.

Tested-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>