mainboard/*/romstage.c: Sanitize system header inclusions

Fix system include paths to be consistent. Chipset support is
part of the Coreboot 'system' and hence 'non-local' (i.e., in
the same directory or context). One possible product of this, is
to perhaps allow future work to do pre-compiled headers (PCH) on
the buildbot for faster build times. However, this currently just
makes mainboard's consistent.

Change-Id: I2f3fd8a3d7864926461c960ca619bff635d7dea5
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-on: http://review.coreboot.org/8085
Tested-by: build bot (Jenkins)
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
diff --git a/src/mainboard/samsung/stumpy/romstage.c b/src/mainboard/samsung/stumpy/romstage.c
index 2ed185b..c5c2095 100644
--- a/src/mainboard/samsung/stumpy/romstage.c
+++ b/src/mainboard/samsung/stumpy/romstage.c
@@ -34,10 +34,10 @@
 #include <bootmode.h>
 #include <superio/ite/common/ite.h>
 #include <superio/ite/it8772f/it8772f.h>
-#include "northbridge/intel/sandybridge/sandybridge.h"
-#include "northbridge/intel/sandybridge/raminit.h"
-#include "southbridge/intel/bd82x6x/pch.h"
-#include "southbridge/intel/bd82x6x/gpio.h"
+#include <northbridge/intel/sandybridge/sandybridge.h>
+#include <northbridge/intel/sandybridge/raminit.h>
+#include <southbridge/intel/bd82x6x/pch.h>
+#include <southbridge/intel/bd82x6x/gpio.h>
 #include <arch/cpu.h>
 #include <cpu/x86/bist.h>
 #include <cpu/x86/msr.h>