ASoC: msm8998: Update supported sample rates for USB backend.

Add entries for 88.2kHZ, 176.4kHz and 352.8kHz to supported
sample list for USB RX and TX backend.

Change-Id: I78261addaa84d1239b92e1528e77bbfcaa09105f
Signed-off-by: Ashish Jain <ashishj@codeaurora.org>