sb/intel/lynxpoint: Move HAVE_SMI_HANDLER to southbridge Kconfig

All Lynx Point board select this, and none build without it.

Change-Id: I4b59b10ee985cff5a8e1442677d36b0be88cf437
Signed-off-by: Tristan Corrick <tristan@corrick.kiwi>
Reviewed-on: https://review.coreboot.org/c/29992
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>

src/southbridge/intel/lynxpoint/Kconfig

@@ -27,6 +27,7 @@ config SOUTH_BRIDGE_OPTIONS # dummy
 	select SOUTHBRIDGE_INTEL_COMMON_ACPI_MADT
 	select SOUTHBRIDGE_INTEL_COMMON_FINALIZE
 	select IOAPIC
+	select HAVE_SMI_HANDLER
 	select HAVE_USBDEBUG_OPTIONS
 	select USE_WATCHDOG_ON_BOOT
 	select PCIEXP_ASPM