[AArch64] Cortex-R82: remove crypto

Remove target features crypto for Cortex-R82, because it doesn't have any, and
add LSE which was missing while we are at it.
This also removes crypto from the v8-R architecture description because that
aligns better with GCC and so far none of the R-cores have implemented crypto,
so is probably a more sensible default.

Differential Revision: https://reviews.llvm.org/D91994