Karma would suggest not.
If Apple switched to AMD in a significant way, one would expect that the relationship would sour rather quickly.
- No more early access to minor revisions (although this has been very rare)
- No more deep discounts
- No more preferred access to top bins
Not, if Intel from this switch also get something significant.
And remember the deal between AMD and Intel about Graphics IP? Its a business deal. It contains more than only cash, and graphics patents.
I will give one clue: in 2018-2019 Intel might change from their own graphics IP, to AMD Navi GPUs, for their integrated GPUs. As has been said previously: Intel and AMD work together on connecting the CPU and GPU from different vendors together with MCM package. For Navi, already there is hints that the GPUs from this architecture might be produced in... Intel fabs. For Intel its best case scenario. They have to feed the fabs with work, and money, and cut money on other initiatives. One of them would be saving money on... GPU software department, because all drivers would be dependent on AMD. As for feeding the fabs, it doesn't matter for who Intel manufactures. It does matter that they do it at all. Wafers are sold, money made. And for AMD - they get possibly best process in the industry.
Its all rumors. Nothing 100% concrete. But few shoes have dropped in few last months.
As a funniest bit in this context. AMD payed to GlobalFoundries 340 million USD, for settling the WSA amendment, and being able to fab elsewhere than only in GloFo fabs(it was one time penalty).
Intel payed 340 million USD to AMD for the Graphics IP. AMD could've wanted more money for it. But they instead went for other things. And as I have posted previously: One of parts of the deal is discount on Thunderbolt technology, and early access to it, for AMD test platforms.
Again. This is nothing official. Just compilation of what is floating in the silicon industry mixed with official information.