core181: Package the correct udev files for riscv64

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

diff --git a/config/rootfiles/core/181/filelists/riscv64/udev b/config/rootfiles/core/181/filelists/riscv64/udev
new file mode 120000 (symlink)
index 0000000..04974e2
--- /dev/null
+++ b/config/rootfiles/core/181/filelists/riscv64/udev
@@ -0,0 +1 @@
+../../../../common/riscv64/udev
\ No newline at end of file