soc/intel/{cml, whl}: Add option to skip HECI disable in SMM

This patch provides an additional option to skip HECI function
disabling using SMM mode for WHL and CML platform, where FSP has
dedicated UPD to make HECI function disable.

User to select HECI_DISABLE_USING_SMM if FSP doesn't provided dedicated
UPD.

Right now CNL and ICL platform will use HECI_DISABLE_USING_SMM kconfig
to make HECI disable and WHL/CML has to rely on FSP to make HECI
disable.

Change-Id: If3b064f3c32877235916f966a01beb525156d188
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/33193
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Nico Huber <nico.h@gmx.de>

src/soc/intel/icelake/smihandler.c

@@ -86,7 +86,7 @@ void smihandler_soc_at_finalize(void)
 
 	config = dev->chip_info;
 
-	if (config->HeciEnabled == 0)
+	if (!config->HeciEnabled && CONFIG(HECI_DISABLE_USING_SMM))
 		pch_disable_heci();
 }