Kernel/aarch64: Stub Inode::{read,write}_bytes

Recent changes caused the build to fail for aarch64, with these
functions stubbed it builds again.

Author: FireFox317

Kernel/Arch/aarch64/Dummy.cpp

@@ -97,6 +97,18 @@ ErrorOr<void> Inode::set_shared_vmobject(Memory::SharedInodeVMObject&)
     return {};
 }
 
+ErrorOr<size_t> Inode::read_bytes(off_t, size_t, UserOrKernelBuffer&, OpenFileDescription*) const
+{
+    VERIFY_NOT_REACHED();
+    return 0;
+}
+
+ErrorOr<size_t> Inode::write_bytes(off_t, size_t, UserOrKernelBuffer const&, OpenFileDescription*)
+{
+    VERIFY_NOT_REACHED();
+    return 0;
+}
+
 }
 
 // UserOrKernelBuffer.cpp