[PATCH v2 06/18] loongarch/crc32: expose CRC32 functions through lib

[WangYuli]

Even though the narrower CRC instructions doesn't require GRLEN=64, they still *aren't* part of LA32 (LoongArch reference manual v1.10, Volume 1, Table 2-1).
Link: https://lore.kernel.org/all/0a7d0a9e-c56e-4ee2-a83b-00164a450abe@xen0n.name/

Therefore, we could not directly add ARCH_HAS_CRC32 to config LOONGARCH.

Thanks,
--
WangYuli