i965: Fix comment about CS scratch space encodings on Broadwell+.
i965: Fix comment about CS scratch space encodings on Broadwell+.

I typo'd this.

Signed-off-by: Kenneth Graunke <bd2562f754ec92342f93f61c25d731e290a2ffa8@whitecape.org>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler