Revert "msm: vidc: Make sure clocks are disabled prepared when freeing ocmem"

This reverts commit 4bce5d41d322f5d67d7fd64dc3020ba5690437ce.

This commit was incorrect. Clocks do not need to be disabled-prepared in order to free ocmem. This is the correct commit regarding this issue: https://github.com/sultanxda/sultan-kernel-hammerhead/commit/aaa1a348be019b2d863a0059ad35f8f15069bf88

Also, this issue does not exist while using the plain CAF kk_3.5 media HAL, as venus_hfi_free_ocmem is only being called twice while using media-caf-new. While using the kk_3.5 media HAL, venus_hfi_free_ocmem is only called once, which is correct.