imx: congatec/cgtqmx8: correct SCU API usage

The return value is int type, not sc_err_t(u8), correct the usage.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Tested-by: Oliver Graute <oliver.graute@kococonnector.com>
Reviewed-by: Oliver Graute <oliver.graute@kococonnector.com>
1 file changed