Don't use static structs for rc init

Most of them was benign and didn't risk any data race; they
were used for write-only memory during init.

The array as_itt_memtab in ih264e_get_rate_control_mem_tab
could however cause a real data race, if multiple threads
try to initialize an encoder at the same time, since it
used as temporary storage when mapping between different

Change-Id: I3ca29f0e3be2fad154becc3ee29867e591975a74
12 files changed