mb/lenovo/t410: Fix I2C SPD address

Use correct address for second DIMM.

Tested on Lenovo T410:
* Both DIMMs are found and are usable

Change-Id: I8bace47f04a0e185c2901695879d4d4e12d4ce6a
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37105
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/lenovo/t410/romstage.c

@@ -71,5 +71,5 @@ void mainboard_pre_raminit(void)
 void mainboard_get_spd_map(u8 *spd_addrmap)
 {
 	spd_addrmap[0] = 0x50;
-	spd_addrmap[2] = 0x52;
+	spd_addrmap[2] = 0x51;
 }