clk: imx: scu: ignore clks not owned by Cortex-A partition

Not register clks that not owned to current partition.
CPU resources are specical resources, it is assigned in ATF, not
non-secure OS, but we still need to allow cpu freq, so return
true for non-secure OS for cpu resources.

Otherwise there will be error log if the resources are owned by current
partition:
[   19.387291] cm40_i2c_div: failed to attached the power domain -2
[   19.389305] cm40_lpuart_div: failed to attached the power domain -2

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Abel Vesa <abel.vesa@linaro.org>
Link: https://lore.kernel.org/r/20230912-imx8-clk-v1-v1-6-69a34bcfcae1@nxp.com
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>