[TableGen] Emit a fatal error on inconsistencies in resource units vs cycles.

Summary:
For targets I'm not familiar with, I've automatically made the "default to 1 for each resource" behaviour explicit in the td files.
For more obvious cases, I've ventured a fix.

Some notes:
 - Exynos is especially fishy.
 - AArch64SchedThunderX2T99.td had some truncated entries. If I understand correctly, the person who wrote that interpreted the ResourceCycle as a range. I made the decision to use the upper/lower bound for consistency with the 'Latency' value. I'm sure there is a better choice.
 - The change to X86ScheduleBtVer2.td is an NFC, it just makes values more explicit.

Also see PR37310.

Reviewers: RKSimon, craig.topper, javed.absar

Subscribers: kristof.beyls, llvm-commits

Differential Revision: https://reviews.llvm.org/D46356

llvm-svn: 334586