mb/hp/z220_sff_workstation/Kconfig: Select MAINBOARD_USES_IFD_GBE_REGION

Select MAINBOARD_USES_IFD_GBE_REGION to make CONFIG_HAVE_GBE_BIN
(Add gigabit ethernet configuration) selection available. Without that
onboard Ethernet won't work.

Signed-off-by: Ao Zhong <hacc1225@gmail.com>
Change-Id: I9fe138363fc47254285ebaa4a7dbe5b94a0a8784
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48007
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by:  Felix Singer <felixsinger@posteo.net>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/hp/z220_sff_workstation/Kconfig

@@ -18,6 +18,7 @@ config BOARD_SPECIFIC_OPTIONS
 	select MAINBOARD_HAS_LIBGFXINIT
 	select INTEL_GMA_HAVE_VBT
 	select GFX_GMA_ANALOG_I2C_HDMI_B
+	select MAINBOARD_USES_IFD_GBE_REGION
 
 config VBOOT
 	select VBOOT_VBNV_CMOS