arm64: dts: juno: fix missing Coresight STM graph connection

OF graph endpoint connections must be bidirectional. Fix 2 missing
connections to the STM output port:

Warning (graph_endpoint): /stm@20100000/port/endpoint: graph connection to node '/funnel@20130000/ports/port@1/endpoint' is not bidirectional
Warning (graph_endpoint): /stm@20100000/port/endpoint: graph connection to node '/funnel@20130000/ports/port@1/endpoint' is not bidirectional

Fixes: cde6f9ab ("arm64: dts: juno: add missing CoreSight STM component")
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Liviu Dudau <liviu.dudau@arm.com>
Cc: Sudeep Holla <sudeep.holla@arm.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>