This patch resolves the residue computation issue detected in cyclic mode.
Now, in cyclic mode, we increment next_sg variable as soon as a period is
transferred instead of after pushing a new sg request.
Then, we take into account that after transferring a complete buffer,
the next_sg variable is equal to 0.
Signed-off-by: NM'boumba Cedric Madianga <cedric.madianga@gmail.com>
Reviewed-by: NLudovic BARRE <ludovic.barre@st.com>
Signed-off-by: NVinod Koul <vinod.koul@intel.com>