Fix AtomicPtr::from_mut align check: Avoid generic arg in const expr.
Fix AtomicPtr::from_mut align check: Avoid generic arg in const expr.

See #76200.

aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust