MBa doesn't have a usable usbdebug port.
Change-Id: Ia8459daa5c9b9405c289954b28ecf1423b1f076c
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/11849
Tested-by: build bot (Jenkins)
Reviewed-by: Marc Jones <marc@marcjonesconsulting.com>