nb/intel/haswell/haswell.h: Do not include `pch.h`

Avoid indirect header inclusion, include `pch.h` where necessary.

Change-Id: I6b72976a28ffaad68bcf558c8a13b5c221070522
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49944
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
diff --git a/src/northbridge/intel/haswell/northbridge.c b/src/northbridge/intel/haswell/northbridge.c
index 2d19ccd..d253380 100644
--- a/src/northbridge/intel/haswell/northbridge.c
+++ b/src/northbridge/intel/haswell/northbridge.c
@@ -13,6 +13,7 @@
 #include <device/pci_ops.h>
 #include <boot/tables.h>
 #include <security/intel/txt/txt_register.h>
+#include <southbridge/intel/lynxpoint/pch.h>
 
 #include "chip.h"
 #include "haswell.h"