Doesn't compile on Apple Silicon

[smessmer]

Trying to compile this crate on Apple M1 Silicon errors with

error[E0425]: cannot find function `__cpuid` in module `arch`
   --> /Users/user/.cargo/registry/src/github.com-1ecc6299db9ec823/rdrand-0.8.2/src/lib.rs:163:33
    |
163 |     let cpuid0 = unsafe { arch::__cpuid(0) };
    |                                 ^^^^^^^ not found in `arch`

error[E0412]: cannot find type `CpuidResult` in module `arch`
   --> /Users/user/.cargo/registry/src/github.com-1ecc6299db9ec823/rdrand-0.8.2/src/lib.rs:171:30
    |
171 | fn amd_family(cpuid1: &arch::CpuidResult) -> u32 {
    |                              ^^^^^^^^^^^ not found in `arch`

error[E0412]: cannot find type `CpuidResult` in module `arch`
   --> /Users/user/.cargo/registry/src/github.com-1ecc6299db9ec823/rdrand-0.8.2/src/lib.rs:176:30
    |
176 | fn has_rdrand(cpuid1: &arch::CpuidResult) -> bool {
    |                              ^^^^^^^^^^^ not found in `arch`

error[E0425]: cannot find function `__cpuid` in module `arch`
   --> /Users/user/.cargo/registry/src/github.com-1ecc6299db9ec823/rdrand-0.8.2/src/lib.rs:184:20
    |
184 |     unsafe { arch::__cpuid(7).ebx & FLAG == FLAG }
    |                    ^^^^^^^ not found in `arch`