♻️ Use 64 byte specific keccak instruction,

The `keccak256-aarch64-simd` crate includes a function that can accept variable-lengthed inputs, however this function has a bit of overhead due to manual padding. The input size to `keccak256` is fixed to 64 bytes here, so we can take advantage of the `simd_keccak_64b_single` function to reduce padding overhead.

crates/mipsevm/src/page.rs

@@ -123,7 +123,7 @@ impl CachedPage {
             #[cfg(feature = "simd-keccak")]
             {
                 let mut out = [0u8; 32];
-                keccak256_aarch64_simd::simd_keccak256_single::<64>(
+                keccak256_aarch64_simd::simd_keccak256_64b_single(
                     &self.data[data_idx..data_idx + 64],
                     &mut out,
                 );

crates/mipsevm/src/utils.rs

@@ -24,7 +24,7 @@ where
     #[cfg(feature = "simd-keccak")]
     {
         let mut out = B256::ZERO;
-        keccak256_aarch64_simd::simd_keccak256_single::<64>(&concat_fixed(a, b), out.as_mut());
+        keccak256_aarch64_simd::simd_keccak256_64b_single(&concat_fixed(a, b), out.as_mut());
         out
     }