aarch64: Avoid redundant MOVs in AdvSIMD F32 logs

aarch64: Avoid redundant MOVs in AdvSIMD F32 logs

Since the last operation is destructive, the first argument to the FMA
also has to be the first argument to the special-case in order to
avoid unnecessary MOVs. Reorder arguments and adjust special-case
bounds to facilitate this.

Reviewed-by: Wilco Dijkstra  <Wilco.Dijkstra@arm.com>
(cherry picked from commit 8b09af572b208bfde4d31c6abbae047dcc217675)