std.Target: Fix Cpu.Model.generic() for arc, csky, and xtensa.
Only targets for which we don't source CPU models/features from LLVM should use
the fallback prong in this switch. Also make it exhaustive to catch similar
mistakes in the future.
7d71e794ddAlex Rønne Petersen committed on 10/3/2024, 3:01:24 AMparentcb1ac0b