uefi: make BootServices::allocation_size_hint private

There is no longer a reason to expose this. This just complicates
the interface and is confusing if kept public.

Author: phip1611

uefi/CHANGELOG.md

@@ -35,6 +35,7 @@
     returned type is automatically freed on the UEFI heap, as long as boot
     services are not excited. By removing the need for that explicit buffer and
     the lifetime, the API is simpler.
+- `BootServices::allocation_size_hint` is now private. Use `BootServices::get_memory_map` instead.
 
 ## Removed
 - Removed the `panic-on-logger-errors` feature of the `uefi` crate. Logger

uefi/src/table/boot.rs

@@ -1709,7 +1709,7 @@ impl MemoryMapBackingMemory {
     /// Returns a best-effort size hint of the memory map size. This is
     /// especially created with exiting boot services in mind.
     #[must_use]
-    pub fn allocation_size_hint(mms: MemoryMapMeta) -> usize {
+    fn allocation_size_hint(mms: MemoryMapMeta) -> usize {
         let MemoryMapMeta {
             desc_size,
             map_size,