[RFC 01/26] rust/hpet: Fix the error caused by vm-memory

[Zhao Liu <zhao1.liu@intel.com>]

error[E0283]: type annotations needed
   --> hw/timer/hpet/src/device.rs:884:55
    |
884 |         self.num_timers == self.num_timers_save.get().into()
    |                         --                            ^^^^
    |                         |
    |                         type must be known at this point
    |
    = note: multiple `impl`s satisfying `usize: PartialEq<_>` found in the following crates: `core`, `vm_memory`:
            - impl PartialEq<vm_memory::endian::BeSize> for usize;
            - impl PartialEq<vm_memory::endian::LeSize> for usize;
            - impl<host> PartialEq for usize
              where the constant `host` has type `bool`;
help: try using a fully qualified path to specify the expected types
    |
884 |         self.num_timers == <u8 as Into<T>>::into(self.num_timers_save.get())
    |                            ++++++++++++++++++++++                          ~

For more information about this error, try `rustc --explain E0283`.
error: could not compile `hpet` (lib) due to 1 previous error

Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
---
 rust/hw/timer/hpet/src/device.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/rust/hw/timer/hpet/src/device.rs b/rust/hw/timer/hpet/src/device.rs
index acf7251029e9..9fd75bf096e4 100644
--- a/rust/hw/timer/hpet/src/device.rs
+++ b/rust/hw/timer/hpet/src/device.rs
@@ -881,7 +881,7 @@ fn is_offset_needed(&self) -> bool {
     }
 
     fn validate_num_timers(&self, _version_id: u8) -> bool {
-        self.num_timers == self.num_timers_save.get().into()
+        self.num_timers == Into::<usize>::into(self.num_timers_save.get())
     }
 }
 
-- 
2.34.1