Add exclusivity operators

[kevin-delmas]

          Behold my mighty scala

periph_bus hasInterferingServices /* Well, that is sort of the default */
core0 hasNonInterferingServices /* That would explicitly be anyone but periph_bus, axi_bus, or msmc in the example */
/*  */
dma interfereWith dma_reg 
dma_reg notInterfereWith dma

It is clearly not as compact as the current version, and it adds the complexity of (naming) new operators. But those are quite common cases, are they not?

Originally posted by @Gaudeval in #21 (comment)