radeonsi: fix 64-bit loads from LDS
radeonsi: fix 64-bit loads from LDS

Fixes spec/arb_tessellation_shader/execution/dvec[23]-vs-tcs-tes, among
others.

Cc: "12.0 13.0" <59f39c0db42d4479a46b02d4d2bc11120e37bb44@lists.freedesktop.org>
Reviewed-by: Bas Nieuwenhuizen <1d31d94f30d40df7951505d1034e1e923d02ec49@basnieuwenhuizen.nl>
Reviewed-by: Marek Olšák <8c7344a1abdb103e79ecfd488098373070c3c70e@amd.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler