MLK-16225: clk: imx8: Do not register clocks for unowned resources

MLK-16225: clk: imx8: Do not register clocks for unowned resources

Registering clocks for unowned resources can result in lots of pointless
scfw errors and potential faults when attempting to use LPCG.

Solve this by checking ownership via sc_rm_is_resource_owned and
returning -ENODEV from clock registration functions. The top-level clock
provider is also modified so that it accepts such errors silently.

This is intended for xen but could also be useful for SCFW partitioning.

Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Reviewed-by: Ranjani Vaidyanathan <Ranjani.vaidyanathan@nxp.com>