[clang] Add vendor identity for Hygon Dhyana processor to cpuid.h

The vendor id is used to determine whether the processor
supports hardware CRC32 in the Scudo code. The previous
discussion about the patch is in [1], and more information
about Hygon Dhyana processor is in[2].

[1]: https://reviews.llvm.org/D62368
[2]: https://git.kernel.org/torvalds/c/c9661c1e80b609cd038db7c908e061f0535804ef

Patch by fanjinke (Jinke Fan)

Differential Revision: https://reviews.llvm.org/D78874