Staging:vc04_services:vchiq_util.c: kzalloc call changed to kcalloc

kzalloc call was changed to kcalloc by checkpatch.pl recommendation

Signed-off-by: Andrey Severin <lkd1024@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>