intel/i82801ix: Add HAVE_INTEL_FIRMWARE

Select this to provide menu in menuconfig to add flash
descriptor file. ME or GbE firmwares themselves are not
required, but integrated NIC MAC and SPI configuration
fields are still useful.

Change-Id: I14b86e2f38ec39924d2cbf0932d82f66ed356a03
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/17805
Tested-by: build bot (Jenkins)
Reviewed-by: Nico Huber <nico.h@gmx.de>

src/southbridge/intel/i82801ix/Kconfig

@@ -24,6 +24,7 @@ config SOUTHBRIDGE_INTEL_I82801IX
 	select HAVE_SMI_HANDLER
 	select HAVE_USBDEBUG_OPTIONS
 	select SOUTHBRIDGE_INTEL_COMMON_GPIO
+	select HAVE_INTEL_FIRMWARE
 
 if SOUTHBRIDGE_INTEL_I82801IX