usbdebug: Move Kconfig under drivers/usb

This menu may become a bit more complicated with addition of
new USB hardware so move it out of console/.

Change-Id: Ieb330675b9227a3e53d093f7c2b5a65e3842dc82
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/5307
Tested-by: build bot (Jenkins)
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>

src/console/console.c

@@ -116,7 +116,7 @@ void console_init(void)
 #if CONFIG_SPKMODEM
 	spkmodem_init();
 #endif
-#if CONFIG_USBDEBUG_IN_ROMSTAGE && !defined(__BOOT_BLOCK__)
+#if CONFIG_CONSOLE_USB && CONFIG_USBDEBUG_IN_ROMSTAGE && !defined(__BOOT_BLOCK__)
 	usbdebug_init();
 #endif