[U-Boot] [PATCH v3] test/py: only check for SPL signature if SPL uses serial output

[Stephen Warren]

On 02/17/2016 10:32 AM, Heiko Schocher wrote:
> check for U-Boot SPL signature only if SPL really has a serial output.
> So check if CONFIG_SPL_SERIAL_SUPPORT is active in board config.

Tested-by: Stephen Warren <swarren at nvidia.com>
Reviewed-by: Stephen Warren <swarren at nvidia.com>