sb/intel/i82371eb: Move wakeup code to romstage

This code is needed in romstage, not ramstage.

Change-Id: Ic38c3c50fb135fba582864a242348ec29cec2991
Signed-off-by: Keith Hui <buurin@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40965
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
diff --git a/src/southbridge/intel/i82371eb/Makefile.inc b/src/southbridge/intel/i82371eb/Makefile.inc
index 1a1a0a1..327c424 100644
--- a/src/southbridge/intel/i82371eb/Makefile.inc
+++ b/src/southbridge/intel/i82371eb/Makefile.inc
@@ -24,8 +24,8 @@
 ramstage-y +=  smbus.c
 ramstage-$(CONFIG_HAVE_ACPI_TABLES) += fadt.c
 ramstage-$(CONFIG_HAVE_ACPI_TABLES) += acpi_tables.c
-ramstage-$(CONFIG_HAVE_ACPI_RESUME) += wakeup.c
 
+romstage-$(CONFIG_HAVE_ACPI_RESUME) += wakeup.c
 romstage-y += early_pm.c
 romstage-y += early_smbus.c