multimedia/av1an: unbreak --encoder svt-av1 after b2302fb4a315

Unprocessed tokens: --tf-level --palette-level --umv --ext-block --hbd-md --bipred-3x3 --pred-me --compound --sg-filter-mode --enable-restoration-filtering --cdef-level --disable-dlf --mrp-level --enable-pic-based-rate-est --enable-local-warp --enable-global-motion --enable-interintra-comp --obmc-level --rdoq-level --filter-intra-level --enable-intra-edge-filter