glamor: Avoid using GL_QUADS on V3D

Merged José María Casanova Crespo requested to merge chema/xserver:no-gl-quads-on-v3d into master

Like in 0e3f1252 ("glamor: Avoid using GL_QUADS on VC4") this will avoid mesa to fallback doing conversion for QUADS primitives.

Signed-off-by: Jose Maria Casanova Crespo jmcasanova@igalia.com

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