Revert "radeonsi: vcn: implement the get_decoder_fence vfunc"
This reverts commit 5e1bd07a. That commit puts a timeout on fence_wait which causes a 8k AV1 decoding regression on gfx940. Fixes: 5e1bd07a ("radeonsi: vcn: implement the get_decoder_fence vfunc")
Signed-off-by: Sonny Jiang sonny.jiang@amd.com