arch: Fix Clippy lints for CPUID updates

[scholzp]

Weird that that the CI didn't catch it some days ago. I found this when executing Clippy locally on my machine.

This fixes lints of the following kind:

error: this `if` can be collapsed into the outer `match`
   --> arch/src/x86_64/mod.rs:874:17
    |
874 | /                 if !config.amx {
875 | |                     if entry.index == 0 {
876 | |                         entry.edx &= !((1 << AMX_BF16) | (1 << AMX_TILE) | (1 << AMX_INT8));
...   |
882 | |                 }
    | |_________________^
    |
    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_match
    = note: `-D clippy::collapsible-match` implied by `-D clippy::all`
    = help: to override `-D clippy::all` add `#[allow(clippy::collapsible_match)]`
help: collapse nested if block
    |
873 ~             0x7
874 ~                 if !config.amx => {
875 |                     if entry.index == 0 {
...
881 |                     }
882 ~                 }
    |

[olivereanderson]

Thanks!

[phip1611]

Weird that that the CI didn't catch it some days ago. I found this when executing Clippy locally on my machine.

clippy frequently changes, probably different versions in use