8322583: RISC-V: Enable fast class initialization checks

Backport-of: 5235cc987d8c4455622acda947bed7321086a385

Author: zifeihan

src/hotspot/cpu/riscv/vm_version_riscv.hpp

@@ -201,6 +201,9 @@ class VM_Version : public Abstract_VM_Version {
   constexpr static bool supports_stack_watermark_barrier() { return true; }
 
   static bool supports_on_spin_wait() { return UseZihintpause; }
+
+  // RISCV64 supports fast class initialization checks
+  static bool supports_fast_class_init_checks() { return true; }
 };
 
 #endif // CPU_RISCV_VM_VERSION_RISCV_HPP