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>

src/mainboard/intel/baskingridge/romstage.c

@@ -21,10 +21,10 @@
 #include <stdint.h>
 #include <stddef.h>
 #include <console/console.h>
-#include "cpu/intel/haswell/haswell.h"
-#include "northbridge/intel/haswell/haswell.h"
-#include "northbridge/intel/haswell/raminit.h"
-#include "southbridge/intel/lynxpoint/pch.h"
+#include <cpu/intel/haswell/haswell.h>
+#include <northbridge/intel/haswell/haswell.h>
+#include <northbridge/intel/haswell/raminit.h>
+#include <southbridge/intel/lynxpoint/pch.h>
 #include "gpio.h"
 
 const struct rcba_config_instruction rcba_config[] = {