cpu/intel: Enter romstage without BIST

When entry to romstage is via cpu/intel/car/romstage.c
BIST has not been passed down the path for sometime.

Change-Id: I345975c53014902269cee21fc393331d33a84dce
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34908
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

src/drivers/intel/fsp1_1/car.c

@@ -37,7 +37,7 @@ void fill_postcar_frame(struct postcar_frame *pcf)
 }
 
 /* This is the romstage entry called from cpu/intel/car/romstage.c */
-void mainboard_romstage_entry(unsigned long bist)
+void mainboard_romstage_entry(void)
 {
 	/* Need to locate the current FSP_INFO_HEADER. The cache-as-ram
 	 * is still enabled. We can directly access work buffer here. */