soc/intel/skylake: set FSP param to enable or skip GOP

Set the FSP parameter PeiGraphicsPeimInit according to RUN_FSP_GOP to
enable or skip GOP.

Change-Id: I5731003c8a094c4d108efbea14d31d335758bbb7
Signed-off-by: Michael Niewöhner <foss@mniewoehner.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36350
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/intel/skylake/chip.c

@@ -509,6 +509,12 @@ void platform_fsp_silicon_init_params_cb(FSPS_UPD *supd)
 		params->PchIoApicFunctionNumber = V_P2SB_IBDF_FUN;
 	}
 
+	dev = pcidev_path_on_root(SA_DEVFN_IGD);
+	if (CONFIG(RUN_FSP_GOP) && dev && dev->enabled)
+		params->PeiGraphicsPeimInit = 1;
+	else
+		params->PeiGraphicsPeimInit = 0;
+
 	soc_irq_settings(params);
 }