Call tokenize_pvq() inside tokenize_b()

Since tokenize_b() is called by var-tx and several other experiments
during tokenization, in order for PVQ to run with those experiemnts
at the same time, it is required to call tokenize_pvq() from tokenize_b()
instead of av1_tokenize_sb().

Change-Id: I0450aa220b696efa3294952e47739acab707d483
1 file changed