[coreboot] Enable USB Debug Device!

Hello,

I bought the "PLX NET20DC USB Debug Device".

Now I want to use this device for debug purpose. But I get with different
mainboards the same build error messages.

Can anybody help?

cc1: warnings being treated as errors

src/console/usbdebug_console.c: In function 'set_ehci_base':

src/console/usbdebug_console.c:32: error: assignment makes integer from
pointer without a cast

src/console/usbdebug_console.c:35: error: assignment makes pointer from
integer without a cast

src/console/usbdebug_console.c: In function 'set_ehci_debug':

src/console/usbdebug_console.c:40: error: assignment makes pointer from
integer without a cast

src/console/usbdebug_console.c: In function 'get_ehci_debug':

src/console/usbdebug_console.c:45: error: return makes integer from pointer
without a cast

src/console/usbdebug_console.c: In function 'dbgp_tx_byte':

src/console/usbdebug_console.c:64: error: pointer targets in passing
argument 2 of 'dbgp_bulk_write_x' differ in signedness

src/include/usbdebug.h:30: note: expected 'const char *' but argument is of
type 'unsigned char *'

src/console/usbdebug_console.c: In function 'dbgp_tst_byte':

src/console/usbdebug_console.c:79: error: return makes integer from pointer
without a cast

make: *** [build/console/usbdebug_console.driver.o] Error 1

Best regards