msm: vidc: Update planes when extradata is set

Currently plane information is updated during start
streaming. This should be done when extradata gets enabled
instead as this is necessary to update buffer requirements.

CRs-Fixed: 2368458
Change-Id: I5214d0bc6842597e5284fd0f077cdf0220136c05
Signed-off-by: Vaibhav Deshu Venkatesh <vdeshuve@codeaurora.org>