clk: imx: scu: Use common error handling code in imx_clk_scu_alloc_dev()

Add a jump target so that a bit of exception handling can be better reused
at the end of this function.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/01446ce9-c0e8-4467-8b2d-fd736bc5b8e4@web.de


Signed-off-by: Abel Vesa <abel.vesa@linaro.org>