clk: qcom: a53-pll: convert to use parent_data rather than parent_names

Change a53-pll driver to use clk_parent_data rather than always looking
up the xo clock in the system clock list.

Note, this change also switches the a53-pll from the global `xo' clock
to the `xo_board', the clock that is specified as the `xo' clock in the
DT file.

Signed-off-by: Dmitry Baryshkov <[e-mail]>
Signed-off-by: Bjorn Andersson <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

drivers/clk/qcom/a53-pll.c

···
 	if (!init.name)
 		return -ENOMEM;
 
-	init.parent_names = (const char *[]){ "xo" };
+	init.parent_data = &(const struct clk_parent_data){
+		.fw_name = "xo", .name = "xo_board",
+	};
 	init.num_parents = 1;
 	init.ops = &clk_pll_sr2_ops;
 	pll->clkr.hw.init = &init;