radeonsi: enable VS_OUT_MISC_SIDE_BUS_ENA
radeonsi: enable VS_OUT_MISC_SIDE_BUS_ENA

This is recommended for better performance.
Diag tests always enable this.

Reviewed-by: Michel Dänzer <242b79f0804cf52679d58f27ed754158c1323c75@amd.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler