Revert "msm: vidc: Allocate ocmem immediately after initialising f/w"

This reverts commit bd62c1ee.  This
revert is a temporary workaround to a firmware bug and will be
unreverted once the new firmware is released.

Change-Id: I169ed9be5cc5aff4190add17e8076cceee995919
Signed-off-by: Deva Ramasubramanian <dramasub@codeaurora.org>