radeonsi/compute: Enable PIPE_SHADER_CAP_DOUBLES v2
radeonsi/compute: Enable PIPE_SHADER_CAP_DOUBLES v2

v2:
  - Simplify ifdef

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

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler