msm: vidc: hfi: Add 100ms delay before checking for valid device handle

ocmem_free is being called twice very quickly, resulting in a race. The device handle is registered as valid both times; however, by the time ocmem_free is called the 2nd time, the 1st ocmem_free had already successfully cleared the memory, resulting in these (harmless) errors:
<3>[  128.062773] ocmem: No valid request to free
<3>[  128.063006] ocmem: Free failed for client video
<7>[  128.063236] msm_vidc: 1: Failed to free ocmem
<7>[  128.063263] msm_vidc: 1: Failed to free OCMEM during PC
<7>[  128.063290] msm_vidc: 1: Failed to unset and free OCMEM for PC -22

Adding a delay before checking for a valid device handle prevents an invalid device handle from being sent to ocmem.

Signed-off-by: Sultanxda <sultanxda@gmail.com>