sb/intel/common: Properly guard USB debug

The declarations in usb_debug.c needs to be guarded in order to not
conflict with other chipsets.

Change-Id: I84c3401b9419f2878c2cfdf81147fa854018f9ae
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36878
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Mike Banon <mikebdp2@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/southbridge/intel/i82801gx/Kconfig b/src/southbridge/intel/i82801gx/Kconfig
index bf9880a..2d95fc2 100644
--- a/src/southbridge/intel/i82801gx/Kconfig
+++ b/src/southbridge/intel/i82801gx/Kconfig
@@ -17,7 +17,6 @@
 	bool
 	select ACPI_INTEL_HARDWARE_SLEEP_VALUES
 	select IOAPIC
-	select HAVE_USBDEBUG
 	select USE_WATCHDOG_ON_BOOT
 	select HAVE_SMI_HANDLER
 	select COMMON_FADT
@@ -33,6 +32,7 @@
 	select SOUTHBRIDGE_INTEL_COMMON_WATCHDOG
 	select SOUTHBRIDGE_INTEL_COMMON_RTC
 	select SOUTHBRIDGE_INTEL_COMMON_RESET
+	select SOUTHBRIDGE_INTEL_COMMON_USB_DEBUG
 
 if SOUTHBRIDGE_INTEL_I82801GX