intel/compiler: fix alignment assert in nir_emit_intrinsic

Fixes: c643979228 (intel/fs: Choose memory message type based on bit size)
Fixes: dEQP-VK.subgroups.ballot_broadcast.compute.subgroupbroadcast_i8vec2

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5000>
1 file changed