This adds support for i.MX SoC family to interconnect framework.

Platform drivers can describe the interconnect graph and several
adjustment knobs where icc node bandwidth is converted to a
DEV_PM_QOS_MIN_FREQUENCY request.

The interconnect provider is probed through the main NOC device and
other adjustable nodes on the same graph are found from a
fsl,scalable-nodes phandle array property.
Signed-off-by: NAlexandre Bailon <abailon@baylibre.com>
Signed-off-by: NLeonard Crestez <leonard.crestez@nxp.com>
Tested-by: NMartin Kepplinger <martin.kepplinger@puri.sm>
Link: https://lore.kernel.org/r/35920e673df6c04cbbb7d877a7d4ba25fd91a784.1586174566.git.leonard.crestez@nxp.comSigned-off-by: NGeorgi Djakov <georgi.djakov@linaro.org>