Add support for the output sample rates 96kHz and 192kHz.

Tested with a Cubox-i imx6 system and an Onkyo TX-SR607 receiver.
Signed-off-by: NAnssi Hannula <anssi.hannula@iki.fi>
Acked-by: NNicolin Chen <nicoleotsuka@gmail.com>
Signed-off-by: NMark Brown <broonie@linaro.org>