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.

Signed-off-by: Deva Ramasubramanian <dramasub@codeaurora.org>
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>

Conflicts:
	drivers/media/platform/msm/vidc/msm_vdec.c
Merge branch 'kk-clean' of https://github.com/bart452/kitkat_kernel_lge_msm8974 into kk-clean

* 'kk-clean' of https://github.com/bart452/kitkat_kernel_lge_msm8974:
  msm: vidc: Increase max buffers to VB2_MAX_FRAME (i.e. 64)