ASoC: Update cx20442 for TTY API change
receive_buf() was recently changed to return the number of bytes received but the cx20442 driver wasn't updated to match the new API. I don't have any hardware but since we don't actually appears to be listening to the data at all just report that we accepted all the data that was offered to us. Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: NLiam Girdwood <lrg@ti.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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