freedreno: reduce line width for deqp further
freedreno: reduce line width for deqp further

See a7eb12d0.. but that wasn't restrictive enough.  Fixes
dEQP-GLES3.functional.rasterization.primitives.line_strip_wide, and
similar

Signed-off-by: Rob Clark <6f78cdb10adbe0a7fbbf4098125a51f401c77a5f@freedesktop.org>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler