ASoC: correct read size return value for erroneous conditions

Wrong return value of in_read() causes integer overflow in omx,
which aborts the process. Correct the return value for erroneous
conditions.

CRs-Fixed: 2336645
Change-Id: Ib01827adc92700876f3b11816857f0086b1b5f94
Signed-off-by: Weiyin Jiang <wjiang@codeaurora.org>