Moved EIP712 filtering related code into its own file

src_features/signMessageEIP712/schema_hash.h

@@ -0,0 +1,12 @@
+#ifndef SCHEMA_HASH_H_
+#define SCHEMA_HASH_H_
+
+#ifdef HAVE_EIP712_FULL_SUPPORT
+
+#include <stdbool.h>
+
+bool    compute_schema_hash(void);
+
+#endif // HAVE_EIP712_FULL_SUPPORT
+
+#endif // SCHEMA_HASH_H_