msm_vidc: Fix setting queue size to firmware.

Incorrect queue size was being set to firmware. This patch fixes the issue.

Change-Id: Ic0ab9384d364f70cf06c352331887dfcdf6592c4
Signed-off-by: Ashray Kulkarni <ashrayk@codeaurora.org>
Signed-off-by: Vinay Kalia <vkalia@codeaurora.org>