i965: Fix "operation operation" in comment.
i965: Fix "operation operation" in comment.

From the redundant redundant department.

Reported-by: Michael Schellenberger Costa <18ceb846d2805ae2741d7a79b2ad7b9c16c56ca9@googlemail.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler