bd82x6x: Fix CONFIG_USBDEBUG

Compilation fails with set_debug_port undeclared in ramstage and
smm code. Fix that by adding usb_debug.c to the appropriate stages.

Change-Id: I2a037d3c5fab76ae6ea65c3a7f4d4e7561bb6d34
Signed-off-by: Sven Schnelle <svens@stackframe.org>
Reviewed-on: http://review.coreboot.org/1376
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
diff --git a/src/southbridge/intel/bd82x6x/Makefile.inc b/src/southbridge/intel/bd82x6x/Makefile.inc
index f9aade8..c588341 100644
--- a/src/southbridge/intel/bd82x6x/Makefile.inc
+++ b/src/southbridge/intel/bd82x6x/Makefile.inc
@@ -41,5 +41,7 @@
 
 romstage-y += early_usb.c early_smbus.c early_me.c me_status.c gpio.c
 romstage-$(CONFIG_USBDEBUG) += usb_debug.c
+ramstage-$(CONFIG_USBDEBUG) += usb_debug.c
+smm-$(CONFIG_USBDEBUG) += usb_debug.c
 romstage-y += reset.c