AMD can use retailer rebates to that. Directly controlling or dictating demands to retailers is not going to go well. Nintendo lost that case here in the US (I think late 80's or early 90's) when it tried to force retailers to sell its then current console at MSRP. AMD can, however, nudge retailers and AIBs in the right direction with rewards like rebates. Positive reinforcement is generally more effective of punishment and threats.
If AMD wants to prevent bundles, they can limit a rebate offered to retailers to cards sold outside of the bundles.
If AMD wants to increase the prevalence of MSRP-ish models on shelves, it can limit retailer rebates, or AIB rebates for the chipset, to cards sold at a certain price point - i.e., MSRP. This could increase the profitability for the AIB and retailer of producing and selling MSRP models.
But if retailers think they can profit more by selling above MSRP or in bundles due to market demand, or if AIBs think they can profit more by producing and selling cards above MSRP, then AMD rebates will not work.
They could try to condition supply preference to AIBs producing certain quotas of MSRP cards, but again it has to be profitable for the AIB.
The increased demand, at the moment, makes these calculations more complicated. If demand is high enough that I can sell at high margin, and if supply is so low I have to just to make enough to stay in business, then I have to sell at highest margin possible.