DRIVERS: SLIMBUS: some more tweaks: Set ROOT_FREQ at 22...

...which is double what we had before.
According to some documents this is what we want
for optimium audio quality Forcec SLIM_RATE to
44.1KHz and 48KHz instead of much lower values.
This way it will be forced to run at these freqs to match
the majority of audio files user will be playing.

ZeroInfinity/Poondog

Change-Id: I09d4dd488a195a28629c32d5f783874aef675d7a
Signed-off-by: ZeroInfinity <infinitezero345@gmail.com>
Signed-off-by: poondog <markj338@gmail.com>
Signed-off-by: flar2 <asegaert@gmail.com>