clk: imx: scu: detach pd if can't power up

detach pd if can't power up as it may be allocated to a differet
partition.

Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Reviewed-by: Abel Vesa <abel.vesa@nxp.com>
Signed-off-by: Abel Vesa <abel.vesa@nxp.com>