interconnect: imx: set src node

When set QoS for a icc path, only set dst icc node is not enough,
also need to set src icc node.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/20220703091132.1412063-6-peng.fan@oss.nxp.com


Signed-off-by: Georgi Djakov <djakov@kernel.org>