intel/fs: Rely on undocumented unrestricted regioning for 32x16-bit integer multiply.

intel/fs: Rely on undocumented unrestricted regioning for 32x16-bit integer multiply.

Even though the hardware spec claims that any "integer DWord multiply"
operation is affected by the regioning restrictions of CHV/BXT/GLK,
this is inconsistent with the behavior of the simulator and with
empirical evidence -- Return false from has_dst_aligned_region_restriction()
for such instructions as a micro-optimization.

Tested-by: Anuj Phogat <anuj.phogat@gmail.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>