msm vidc : Fix memory leak in venus_hfi_core_init()

In venus_hfi_core_init() vote_data structure memory is allocated
and it is being overwritten in consecutive function __init_bus()
without freeing the original memory causing memory leak. Fix
the memory leak issue by removing the default initialisation
in __init_bus().

Change-Id: I007e6363327a32c4fd66bcaf02199fe627a4260f
Signed-off-by: SaiVamshi Dobbali <sdobbali@codeaurora.org>
Signed-off-by: Maheshwar Ajja <majja@codeaurora.org>