ACPI S3: Move SMP trampoline recovery

No need to make low memory backup unless we are on
S3 resume path.
Hide those details from ACPI.

Change-Id: Ic08b6d70c7895b094afdb3c77e020ff37ad632a1
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/15241
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/arch/x86/acpi.c

@@ -1127,12 +1127,6 @@ void *acpi_find_wakeup_vector(void)
 	return wake_vec;
 }
 
-#if CONFIG_SMP
-extern char *lowmem_backup;
-extern char *lowmem_backup_ptr;
-extern int lowmem_backup_size;
-#endif
-
 #define WAKEUP_BASE 0x600
 
 void (*acpi_do_wakeup)(uintptr_t vector, u32 backup_source, u32 backup_target,
@@ -1155,15 +1149,6 @@ void acpi_jump_to_wakeup(void *vector)
 		}
 	}
 
-#if CONFIG_SMP
-	// FIXME: This should go into the ACPI backup memory, too. No pork sausages.
-	/*
-	 * Just restore the SMP trampoline and continue with wakeup on
-	 * assembly level.
-	 */
-	memcpy(lowmem_backup_ptr, lowmem_backup, lowmem_backup_size);
-#endif
-
 	/* Copy wakeup trampoline in place. */
 	memcpy((void *)WAKEUP_BASE, &__wakeup, __wakeup_size);