AMD family 17h (znver1) scheduler model update.

Summary:
This patch enables the following:
1) Regex based Instruction itineraries for integer instructions.
2) The instructions are grouped as per the nature of the instructions
   (move, arithmetic, logic, Misc, Control Transfer). 
3) FP instructions and their itineraries are added which includes values
   for SSE4A, BMI, BMI2 and SHA instructions.

Patch by Ganesh Gopalasubramanian

Reviewers: RKSimon, craig.topper

Subscribers: vprasad, shivaram, ddibyend, andreadb, javed.absar, llvm-commits

Differential Revision: https://reviews.llvm.org/D36617

llvm-svn: 312237