msm: vidc: Increase max buffers to VB2_MAX_FRAME (i.e. 64)

It's an arbitrary limit anyway.  Increase it to satisfy some clients
that'd like more buffers.

Change-Id: Ia1e0afd09089b6303b6590de804ea509b01626f4
Signed-off-by: Deva Ramasubramanian <dramasub@codeaurora.org>
Signed-off-by: Balamurugan Alagarsamy <balaga@codeaurora.org>
Signed-off-by: Jake Weinstein <xboxlover360@gmail.com>
v4l2: vb2: replace VIDEO_MAX_FRAME with VB2_MAX_FRAME

- vb2 drivers to rely on VB2_MAX_FRAME.

- VB2_MAX_FRAME bumps the value to 64 from current 32

Change-Id: I3d7998898df43553486166c44b54524aac449deb
Signed-off-by: Balamurugan Alagarsamy <balaga@codeaurora.org>
Signed-off-by: Jake Weinstein <xboxlover360@gmail.com>