usbdebug: Support AMD cimx/sb700 cimx/sb800 once again

Support code for sb700 and sb800 existed already, but Kconfig and
compile-time issues prevented from enabling USBDEBUG for boards
with the affected AMD southbridges.

Change-Id: I49e955fcc6e54927320b9dc7f62ea00c55c3cedf
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/3439
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martin.roth@se-eng.com>
diff --git a/src/southbridge/amd/cimx/sb800/Makefile.inc b/src/southbridge/amd/cimx/sb800/Makefile.inc
index 831cc2e..0ff9e1e 100644
--- a/src/southbridge/amd/cimx/sb800/Makefile.inc
+++ b/src/southbridge/amd/cimx/sb800/Makefile.inc
@@ -34,8 +34,8 @@
 ramstage-$(CONFIG_HAVE_ACPI_RESUME) += spi.c
 ramstage-$(CONFIG_GENERATE_ACPI_TABLES) += fadt.c
 
-romstage-$(CONFIG_USBDEBUG) += enable_usbdebug.c
-ramstage-$(CONFIG_USBDEBUG) += enable_usbdebug.c
+romstage-$(CONFIG_USBDEBUG) += ../../sb800/enable_usbdebug.c
+ramstage-$(CONFIG_USBDEBUG) += ../../sb800/enable_usbdebug.c
 
 ramstage-y   += smbus.c
 ramstage-y   += lpc.c