kern/svc: update WaitForAddress to support 64-bit WaitIfEqual

libraries/libmesosphere/include/mesosphere/arch/arm64/kern_userspace_memory_access.hpp

@@ -25,6 +25,7 @@ namespace ams::kern::arch::arm64 {
             static bool CopyMemoryFromUser(void *dst, const void *src, size_t size);
             static bool CopyMemoryFromUserAligned32Bit(void *dst, const void *src, size_t size);
             static bool CopyMemoryFromUserAligned64Bit(void *dst, const void *src, size_t size);
+            static bool CopyMemoryFromUserSize64Bit(void *dst, const void *src);
             static bool CopyMemoryFromUserSize32Bit(void *dst, const void *src);
             static s32  CopyStringFromUser(void *dst, const void *src, size_t size);