cpu/*/car: fix ancient URL explaining XIP range run-time calculation

Change-Id: I49526b6aafb516a668b7b5e983a0372e3d26a8fc
Signed-off-by: Stefan Tauner <stefan.tauner@gmx.at>
Reviewed-on: https://review.coreboot.org/28216
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
diff --git a/src/cpu/intel/car/core2/cache_as_ram.S b/src/cpu/intel/car/core2/cache_as_ram.S
index 3399510..f47e812 100644
--- a/src/cpu/intel/car/core2/cache_as_ram.S
+++ b/src/cpu/intel/car/core2/cache_as_ram.S
@@ -148,7 +148,7 @@
 	xorl	%edx, %edx
 	/*
 	 * IMPORTANT: The following calculation _must_ be done at runtime. See
-	 * https://www.coreboot.org/pipermail/coreboot/2010-October/060855.html
+	 * https://mail.coreboot.org/pipermail/coreboot/2010-October/060922.html
 	 */
 	movl	$_program, %eax
 	andl	$(~(CONFIG_XIP_ROM_SIZE - 1)), %eax