msm: camera: Fix for ZSL issue

In ZSL(Zero Shutter Lag) mode, only 5 buffers are
allocated. 3 buffers are with VFE and 2 buffers are
with userspace. After receiving 3rd buffer only
userspace code enqueue free buffers again to driver.
After sending 2 buffers to userspace driver is not
able to find free buffer to satisfy 3 buffer requirement.
So driver always resend it to VFE instead of userspace
and no frames to userspace.

Update driver to send the buffer to userspace and
resend the same buffer to VFE also in ZSL mode.

CRs-Fixed: 364107
Change-Id: I4111052acdb3a1973121f71d332c4d3a569c700d
Signed-off-by: Suresh Vankadara <svankada@codeaurora.org>