clk: imx8m: drop clk_hw_set_parent for A53

The parent settings have been moved to dtsi, we no need to
set parent here. And clk_hw_set_parent will trigger lockdep warning,
because this api not have prepare_lock.

Reported-by: Leonard Crestez <leonard.crestez@nxp.com>
Reviewed-by: Dong Aisheng <aisheng.dong@nxp.com>
Reviewed-by: Leonard Crestez <leonard.crestez@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

drivers/clk/imx/clk-imx8mq.c

@@ -599,9 +599,6 @@ static int imx8mq_clocks_probe(struct platform_device *pdev)
 					   hws[IMX8MQ_ARM_PLL_OUT]->clk,
 					   hws[IMX8MQ_CLK_A53_DIV]->clk);
 
-	clk_hw_set_parent(hws[IMX8MQ_CLK_A53_SRC], hws[IMX8MQ_SYS1_PLL_800M]);
-	clk_hw_set_parent(hws[IMX8MQ_CLK_A53_CORE], hws[IMX8MQ_ARM_PLL_OUT]);
-
 	imx_check_clk_hws(hws, IMX8MQ_CLK_END);
 
 	err = of_clk_add_hw_provider(np, of_clk_hw_onecell_get, clk_hw_data);