ARM: dts: imx7ulp: add HSRUN mode clocks
i.MX7ULP can switch CPU between RUN mode and HSRUN mode by programming SMC1 register, different clock sources will be used for CPU in different modes, so SMC1 can be abstracted as a clock controller for CPU clock switch, this patch adds support for it. Signed-off-by: NAnson Huang <Anson.Huang@nxp.com> Signed-off-by: NShawn Guo <shawnguo@kernel.org>
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