msm: camera: ife: Always send stop immediately when stopping hw

As the name implies, we stop the HW sooner, so prefer it over
"stop at frame boundary".

CRs-Fixed: 2724889
Change-Id: I7fa353c09dbe733e57f099893edc0e7f7fa18e7a
Signed-off-by: Fernando Pacheco <fpacheco@codeaurora.org>