soc/amd/picasso: Add missing include to smi.h

BUG=b:154756391
TEST=Don't see build failure.

Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Change-Id: I36b81643c29ec1e7978d521206fbc366060ab286
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43330
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/amd/picasso/include/soc/smi.h

@@ -3,6 +3,7 @@
 #ifndef __SOUTHBRIDGE_AMD_PI_PICASSO_SMI_H__
 #define __SOUTHBRIDGE_AMD_PI_PICASSO_SMI_H__
 
+#include <types.h>
 
 #define SMI_GEVENTS			24
 #define SCIMAPS				58