video: driver: add support for create buf

Add handling for VIDIOC_CREATE_BUFS ioctl in driver.
    This ioctl is used to create buffers for memory mapped
    or DMA buffer I/O.
    It can be used as an alternative or in addition to the
    ioctl VIDIOC_REQBUFS ioctl, when a tighter control over
    buffers is required.
    This ioctl can be called multiple times to create buffers
    of different sizes.

    Partially Fixes: v4l2-compliance:
                    test VIDIOC_REQBUFS/CREATE_BUFS/QUERYBUF.

Change-Id: I9dd6c3f48e48e297b3e56fd4c8062869c8b55bee
Signed-off-by: Dikshita Agarwal <quic_dikshita@quicinc.com>

driver/vidc/inc/msm_vidc.h

@@ -27,6 +27,7 @@ int msm_vidc_s_param(void *instance, struct v4l2_streamparm *sp);
 int msm_vidc_g_param(void *instance, struct v4l2_streamparm *sp);
 int msm_vidc_reqbufs(void *instance, struct v4l2_requestbuffers *b);
 int msm_vidc_querybuf(void *instance, struct v4l2_buffer *b);
+int msm_vidc_create_bufs(void *instance, struct v4l2_create_buffers *b);
 int msm_vidc_release_buffer(void *instance, int buffer_type,
 		unsigned int buffer_index);
 int msm_vidc_qbuf(void *instance, struct media_device *mdev,