mb/google/zork: fix incorrect DRAM SPD table load for dirinboz

BUG=b:161579679
BRANCH=master
TEST=1. emerge-zork coreboot chromeos-bootimage
     2. power on proto board successfully

Change-Id: Ia736b0f25824eebe4ef25a11646f82963611e3b3
Signed-off-by: Kevin Chiu <kevin.chiu@quantatw.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44341
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/mainboard/google/zork/variants/dirinboz/Makefile.inc

@@ -1,5 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0-or-later
 
-subdirs-y += ../baseboard/spd
+subdirs-y += ./spd
 
 ramstage-y += gpio.c