We can't make guarantees on alignment for existing calls to `pset`,
so we should default to loading unaligned. But in that case, we should
just use `ploadu` directly. For loading constants, this load should hopefully
get optimized away.
This is causing segfaults in Google Maps.
(cherry picked from commit 12e8d57108c50d8a63605c6eb0144c838c128337)
ee4e099aa2