drivers/intel/fsp2_0: Unbind UDK2015 Kconfig from FSP2.0 driver

Now SOC code can select the require UDK support package for any
platform going forward with FSP2.0 model.

Change-Id: Ie6d1b9133892c59210a659ef0ad4b59ebf9f1e45
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/23426
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/soc/intel/skylake/Kconfig

@@ -104,6 +104,7 @@ config USE_FSP2_0_DRIVER
 	def_bool y
 	depends on MAINBOARD_USES_FSP2_0
 	select PLATFORM_USES_FSP2_0
+	select UDK_2015_BINDING
 	select INTEL_GMA_ADD_VBT_DATA_FILE if RUN_FSP_GOP
 	select POSTCAR_CONSOLE
 	select POSTCAR_STAGE