msm_vidc: update driver for firmware interface changes

This change updates the driver to the new firmware requirements.
Since, FW interface has changed significantly so pre-existing driver code
does not work with this firmware. This change is a must for driver to
work with new firmware. After this change, old FW will not work with this
driver.

Change-Id: I2f8408dd46909f7f527252410655c6fa919c465a
Signed-off-by: Ashray Kulkarni <ashrayk@codeaurora.org>
Signed-off-by: Vinay Kalia <vkalia@codeaurora.org>