slippy/falco/peppy: Fix SPD GPIO initialization.

SPD GPIOs were being read prior to initialization in romstage_common. To
fix, pass the copy_spd function to romstage_common, to be called at the
appropriate time (after PCH init, before DRAM init).

Change-Id: I2554813e56a58c8c81456f1a53cc8ce9c2030a73
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/58608
Reviewed-on: http://review.coreboot.org/4237
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

src/cpu/intel/haswell/haswell.h

@@ -151,6 +151,7 @@ struct romstage_params {
 	const void *gpio_map;
 	const struct rcba_config_instruction *rcba_config;
 	unsigned long bist;
+	void (*copy_spd)(struct pei_data *);
 };
 void mainboard_romstage_entry(unsigned long bist);
 void romstage_common(const struct romstage_params *params);

src/cpu/intel/haswell/romstage.c

@@ -246,6 +246,9 @@ void romstage_common(const struct romstage_params *params)
 
 	report_platform_info();
 
+	if (params->copy_spd != NULL)
+		params->copy_spd(params->pei_data);
+
 	sdram_initialize(params->pei_data);
 
 	timestamp_add_now(TS_AFTER_INITRAM);