nb/intel/sandybridge: Specify supported memory types

Change-Id: Ie43e818d03f411733e1bba5b7a4721c9a54ff4a4
Signed-off-by: Elyes Haouas <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/69019
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/northbridge/intel/sandybridge/Kconfig

@@ -9,6 +9,14 @@ config NORTHBRIDGE_INTEL_SANDYBRIDGE
 
 if NORTHBRIDGE_INTEL_SANDYBRIDGE
 
+config NORTHBRIDGE_SPECIFIC_OPTIONS
+	def_bool y
+	select NO_DDR5
+	select NO_LPDDR4
+	select NO_DDR4
+	select NO_DDR2
+	select USE_DDR3
+
 config SANDYBRIDGE_VBOOT_IN_ROMSTAGE
 	bool
 	default n