msm: mpq8064: Improve VP de-interlacing completion time

VP time to de-interlacing for 1080i content was over 20ms. This
was way too long considering content updating at 60Hz requires
latency to be under 16ms. This change allow for de-interlacing
to complete within 7ms.

Change-Id: Iae2be758ef8d5a6fcecb96df93448226c9ed9109
Signed-off-by: Terence Hampson <thampson@codeaurora.org>