rust: cpufreq: replace MaybeUninit::zeroed().assume_init() with pin_init::zeroed()

All types in `bindings` implement `Zeroable` if they can, so use
`pin_init::zeroed` instead of relying on `unsafe` code.

If this ends up not compiling in the future, something in bindgen or on
the C side changed and is most likely incorrect.

Signed-off-by: Benno Lossin <lossin@kernel.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>

rust/kernel/cpufreq.rs

@@ -27,7 +27,6 @@ use crate::clk::Clk;
 use core::{
     cell::UnsafeCell,
     marker::PhantomData,
-    mem::MaybeUninit,
     ops::{Deref, DerefMut},
     pin::Pin,
     ptr,
@@ -1013,8 +1012,7 @@ impl<T: Driver> Registration<T> {
         } else {
             None
         },
-        // SAFETY: All zeros is a valid value for `bindings::cpufreq_driver`.
-        ..unsafe { MaybeUninit::zeroed().assume_init() }
+        ..pin_init::zeroed()
     };
 
     const fn copy_name(name: &'static CStr) -> [c_char; CPUFREQ_NAME_LEN] {