intel/quark: Use common romstage entry

Change-Id: Ifb2adcdef7265d43cb2bf6886f126f1a17bf08a0
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35146
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/soc/intel/quark/romstage/Makefile.inc

@@ -22,5 +22,6 @@ romstage-y += mtrr.c
 romstage-y += pcie.c
 romstage-y += report_platform.c
 romstage-y += romstage.c
+romstage-y += ../../../../cpu/intel/car/romstage.c
 
 postcar-y += mtrr.c

src/soc/intel/quark/romstage/fsp2_0.c

@@ -13,7 +13,6 @@
  * GNU General Public License for more details.
  */
 
-#include <arch/cpu.h>
 #include <arch/romstage.h>
 #include <arch/symbols.h>
 #include <console/console.h>
@@ -28,9 +27,7 @@
 #include <soc/reg_access.h>
 #include <soc/storage_test.h>
 
-static struct postcar_frame early_mtrrs;
-
-asmlinkage void car_stage_entry(void)
+void mainboard_romstage_entry(void)
 {
 	bool s3wake;
 
@@ -61,9 +58,6 @@ asmlinkage void car_stage_entry(void)
 
 	/* Initialize the PCIe bridges */
 	pcie_init();
-
-	prepare_and_run_postcar(&early_mtrrs);
-	/* We do not return here. */
 }
 
 static struct chipset_power_state power_state;