ACPI S3: Depend on RELOCATABLE_RAMSTAGE

With RELOCATABLE_RAMSTAGE, S3 resume path only uses
memory that is reserved from OS. So there is no need
for low memory backup and recovery.

Change-Id: If7f83711685ac445abf4cd1aa6b66c3391e0e554
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/26834
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/lib/hardwaremain.c

@@ -187,8 +187,6 @@ static boot_state_t bs_os_resume_check(void *arg)
 		boot_states[BS_OS_RESUME].arg = wake_vector;
 		return BS_OS_RESUME;
 	}
-
-	acpi_prepare_resume_backup();
 #endif
 	timestamp_add_now(TS_CBMEM_POST);