intel/nehalem post-car: Use postcar_frame for MTRR setup

Adapt implementation from skylake to prepare for removal of HIGH_MEMORY_SAVE
and moving on to RELOCATABLE_RAMSTAGE. With the change, CBMEM and SMM regions
are set to WRBACK with MTRRs and romstage ram stack is moved to CBMEM.

Change-Id: I84f6fa6f37a7348b2d4ad9f08a18bebe4b1e34e2
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/15793
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

src/mainboard/lenovo/x201/romstage.c

@@ -279,12 +279,9 @@ void mainboard_romstage_entry(unsigned long bist)
 		outl(reg32 & ~(7 << 10), DEFAULT_PMBASE + 0x04);
 	}
 
-
 	romstage_handoff_init(s3resume);
 
-	if (s3resume)
-		acpi_prepare_for_resume();
-	else
+	if (!s3resume)
 		quick_ram_check();
 
 #if IS_ENABLED(CONFIG_LPC_TPM)

src/mainboard/packardbell/ms2290/romstage.c

@@ -269,11 +269,8 @@ void mainboard_romstage_entry(unsigned long bist)
 		outl(reg32 & ~(7 << 10), DEFAULT_PMBASE + 0x04);
 	}
 
-
 	romstage_handoff_init(s3resume);
 
-	if (s3resume)
-		acpi_prepare_for_resume();
-	else
+	if (!s3resume)
 		quick_ram_check();
 }