soc/intel/{apollolake, geminilake}: Add option to skip coreboot MP init

This patch provides option for mainboard to skip coreboot MP
initialization if required based on use_fsp_mp_init.

Option for mainboard to skip coreboot MP initialization
* 0 = Make use of coreboot MP Init
* 1 = Make use of FSP MP Init

Default coreboot does MP initialization for APL and GLK.

Change-Id: I9253af6f28bf694782c117296766fd8564dc2b14
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/26643
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/soc/intel/apollolake/chip.c

@@ -614,7 +614,7 @@ void platform_fsp_silicon_init_params_cb(FSPS_UPD *silupd)
 	if (!IS_ENABLED(CONFIG_SOC_INTEL_GLK))
 		silconfig->MonitorMwaitEnable = 0;
 
-	silconfig->SkipMpInit = 1;
+	silconfig->SkipMpInit = !cfg->use_fsp_mp_init;
 
 	/* Disable setting of EISS bit in FSP. */
 	silconfig->SpiEiss = 0;

src/soc/intel/apollolake/chip.h

@@ -152,6 +152,13 @@ struct soc_intel_apollolake_config {
 	 * (1) Power
 	 * (2) Power & Performance */
 	enum pnp_settings pnp_settings;
+
+	/*
+	 * Option for mainboard to skip coreboot MP initialization
+	 * 0 = Make use of coreboot MP Init
+	 * 1 = Make use of FSP MP Init
+	 */
+	uint8_t use_fsp_mp_init;
 };
 
 typedef struct soc_intel_apollolake_config config_t;