clk: imx: imx8: Add a message in case of devm_clk_hw_register_mux_parent_data_table() error

If devm_clk_hw_register_mux_parent_data_table() fails, we branch to the
error handling path and imx_check_clk_hws() is never called.

Actually, imx_check_clk_hws() is a no-op because values in 'hws' are either
valid, either NULL.

Move the call to imx_check_clk_hws() in the error handling path, so that
an error is logged.

Fixes: d3a0946d ("clk: imx: imx8: add audio clock mux driver")
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>