[X86] Fix missing predicates HasAVX512 Predicates in avx512_sqrt_scalar.

Summary:
For example, VSQRTSDZr and VSQRTSSZr were missing the predicate.
Also fix braces indentation and braces for consistency.

Reviewers: craig.topper, RKSimon

Suscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D41983

llvm-svn: 322478