radv/winsys: Fail early on overgrown cs.
radv/winsys: Fail early on overgrown cs.

When !use_ib_bos, we can't easily chain ibs one to another. If the
required cs size grows over 1Mi - 8 dwords just fail the cs so that we
won't assert-fail in radv_amdgpu_winsys_cs_submit later on.

Reviewed-by: Bas Nieuwenhuizen <1d31d94f30d40df7951505d1034e1e923d02ec49@basnieuwenhuizen.nl>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler