derive Clone for hash::Context

The HASH accelerator can be used for HMAC if a key is provided. One
significant use case of HMAC is as a PRF for the PBKDF2 algorithm, but
this requires that the hashing state can be recursively "branched"
multiple times.

embassy-stm32/src/hash/mod.rs

@@ -101,6 +101,7 @@ pub enum DataType {
 
 /// Stores the state of the HASH peripheral for suspending/resuming
 /// digest calculation.
+#[derive(Clone)]
 pub struct Context<'c> {
     first_word_sent: bool,
     key_sent: bool,