riscv_cached_mvendorid
unsigned long riscv_cached_mvendorid(unsigned int cpu_id);
EXPORT_SYMBOL(riscv_cached_mvendorid);
cpu_id = riscv_cached_mvendorid(cpu);
if (riscv_cached_mvendorid(0) == ANDES_VENDOR_ID &&
if (riscv_cached_mvendorid(0) == THEAD_VENDOR_ID &&
riscv_cached_mvendorid(0) == THEAD_VENDOR_ID &&