mb/*: Update SPD mapping for sandybridge boards

Boards without HAVE_SPD_IN_CBFS: Move SPD mapping into devicetree.

Boards with HAVE_SPD_IN_CBFS: Convert to Haswell-style SPD mapping.

Change-Id: Id6ac0a36b2fc0b9686f6e875dd020ae8dba72a72
Signed-off-by: Keith Hui <buurin@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/76967
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin L Roth <gaumless@gmail.com>
diff --git a/src/mainboard/kontron/ktqm77/devicetree.cb b/src/mainboard/kontron/ktqm77/devicetree.cb
index 853a410..a035628 100644
--- a/src/mainboard/kontron/ktqm77/devicetree.cb
+++ b/src/mainboard/kontron/ktqm77/devicetree.cb
@@ -2,6 +2,7 @@
 	# IGD Displays
 	register "gfx" = "GMA_STATIC_DISPLAYS(0)"
 
+	register "spd_addresses" = "{0x50, 0, 0x52, 0}"
 	register "max_mem_clock_mhz" = "800"
 	register "ec_present" = "1"