soc/intel/braswell/chip.h: Include smbios.h for Type9 Entries

In order to add the smbios_slot_desc for the SMBIOS Type9 entries into
the devicetree, and not use numbers but strings like
"SlotTypePciExpressGen3X4", smbios.h needs to be included in the
static.c.

Signed-off-by: Michał Żygowski <michal.zygowski@3mdeb.com>
Change-Id: Id15fe4101d14479b02e536fdf63748a241c02bd3
Reviewed-on: https://review.coreboot.org/c/coreboot/+/39351
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Frans Hendriks <fhendriks@eltan.com>

src/soc/intel/braswell/chip.h

@@ -27,6 +27,7 @@
 #include <fsp/util.h>
 #include <intelblocks/lpc_lib.h>
 #include <soc/pci_devs.h>
+#include <smbios.h>
 
 #define SVID_CONFIG1		1
 #define SVID_CONFIG3		3