nb/intel/sandybridge: Move DMI init code

Move the DMI initialization code to northbridge folder.
Leave southbridge specific settings in bd82x6x folder and call it from
northbridge code.

Tested on Lenovo T520 (Intel Sandy Bridge).
Still boots to OS, no errors visible in dmesg.

Change-Id: Ib0b47391f3309f9ab0c3a3a8d525f38f8cca73c0
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32073
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
diff --git a/src/southbridge/intel/bd82x6x/pch.h b/src/southbridge/intel/bd82x6x/pch.h
index fb8238a..faa6822 100644
--- a/src/southbridge/intel/bd82x6x/pch.h
+++ b/src/southbridge/intel/bd82x6x/pch.h
@@ -77,6 +77,8 @@
 void mainboard_rcba_config(void);
 void early_pch_init_native(void);
 void early_pch_init(void);
+void early_pch_init_native_dmi_pre(void);
+void early_pch_init_native_dmi_post(void);
 
 struct southbridge_usb_port
 {