[scudo] Add support for LoongArch hardware CRC32 checksumming (#83113)

One has to probe for platform capability prior to use with HWCAP,
according to LoongArch documentation.

GitOrigin-RevId: 597f9761c3a5ba278fa930d2fac13f156287d505
Change-Id: I721419b72ec00ca5e1f433e1b80a957fe39070f8
3 files changed