ks8851: Change to check alignment of chunks while handling partial frames

The parital frames when stored in next round buffer, alignment of fifo
read was not checked leading to read fifo failure, alignment of chunk
read is introduced through this change.

Change-Id: Ifad3693f606f7bd84df4ccf961eaedaa29f585cd
Acked-by: Rishav LNU <rna@qti.qualcomm.com>
Signed-off-by: Mohammed Javid <mjavid@codeaurora.org>