xf86drm.h: add DRM_CAS implementation for SunPro C compiler (SunOS)
Adding a DRM_CAS() implementation for SunPro C compilier, using it's builtin atomic operations.
Signed-off-by: Enrico Weigelt, metux IT consult info@metux.net
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Adding a DRM_CAS() implementation for SunPro C compilier, using it's builtin atomic operations.
Signed-off-by: Enrico Weigelt, metux IT consult info@metux.net