The following news does not impact AMD's use of 7nm. Rather, AMD had already decided to go 7nm with TSMC -- and 14nm with GlobalFoundries. AMD has already "taped out" "multiple" CPU and GPU 7nm circuits with TSMC (as noted above).

GF will now "specialize" in 14nm/12nm and other "established" processes. One might speculate that the specialization may make AMD's 14nm/12nm products fabricated at GF even more competitive.
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GlobalFoundries Puts 7nm ‘On-hold Indefinitely; Spins Off ASIC Division As Subsidiary

AMD’s 7nm Zen 2, Vega and EPYC CPUs will be manufactured by TSMC. The company’s [AMDs] Chief Technology Officer Mark Papermaster announced the move yesterday, at the same time GlobalFoundries also put out a press release that highlighted its latest strategic change [to quit working on 7nm].

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