clk: qcom: gcc-msm8996: start getting rid of xo clk

The "xo" fixed_factor clock is a leftover/hack from a time when we
couldn't make rpmhcc the root of all clocks. It is going to be removed
once all users of this clock are converted to use clocks specified
through the DTS. Replace internal usage of the xo clock with the cxo
(RPM_SMD_BB_CLK1) parent, specifying xo_board as a fallback.

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

drivers/clk/qcom/gcc-msm8996.c

···
 		.enable_mask = BIT(0),
 		.hw.init = &(struct clk_init_data){
 			.name = "gpll0_early",
-			.parent_hws = (const struct clk_hw*[]){
-				&xo.hw,
+			.parent_data = &(const struct clk_parent_data){
+				.fw_name = "cxo", .name = "xo_board",
 			},
 			.num_parents = 1,
 			.ops = &clk_alpha_pll_ops,
···
 		.enable_mask = BIT(4),
 		.hw.init = &(struct clk_init_data){
 			.name = "gpll4_early",
-			.parent_hws = (const struct clk_hw*[]){
-				&xo.hw,
+			.parent_data = &(const struct clk_parent_data){
+				.fw_name = "cxo", .name = "xo_board",
 			},
 			.num_parents = 1,
 			.ops = &clk_alpha_pll_ops,
···
 };
 
 static const struct clk_parent_data gcc_xo_gpll0[] = {
-	{ .hw = &xo.hw },
+	{ .fw_name = "cxo", .name = "xo_board" },
 	{ .hw = &gpll0.clkr.hw }
 };
 
···
 };
 
 static const struct clk_parent_data gcc_xo_sleep_clk[] = {
-	{ .hw = &xo.hw },
+	{ .fw_name = "cxo", .name = "xo_board" },
 	{ .fw_name = "sleep_clk", .name = "sleep_clk" }
 };
 
···
 };
 
 static const struct clk_parent_data gcc_xo_gpll0_gpll0_early_div[] = {
-	{ .hw = &xo.hw },
+	{ .fw_name = "cxo", .name = "xo_board" },
 	{ .hw = &gpll0.clkr.hw },
 	{ .hw = &gpll0_early_div.hw }
 };
···
 };
 
 static const struct clk_parent_data gcc_xo_gpll0_gpll4[] = {
-	{ .hw = &xo.hw },
+	{ .fw_name = "cxo", .name = "xo_board" },
 	{ .hw = &gpll0.clkr.hw },
 	{ .hw = &gpll4.clkr.hw }
 };
···
 };
 
 static const struct clk_parent_data gcc_xo_gpll0_aud_ref_clk[] = {
-	{ .hw = &xo.hw },
+	{ .fw_name = "cxo", .name = "xo_board" },
 	{ .hw = &gpll0.clkr.hw },
 	{ .fw_name = "aud_ref_clk", .name = "aud_ref_clk" }
 };
···
 };
 
 static const struct clk_parent_data gcc_xo_gpll0_sleep_clk_gpll0_early_div[] = {
-	{ .hw = &xo.hw },
+	{ .fw_name = "cxo", .name = "xo_board" },
 	{ .hw = &gpll0.clkr.hw },
 	{ .fw_name = "sleep_clk", .name = "sleep_clk" },
 	{ .hw = &gpll0_early_div.hw }
···
 };
 
 static const struct clk_parent_data gcc_xo_gpll0_gpll4_gpll0_early_div[] = {
-	{ .hw = &xo.hw },
+	{ .fw_name = "cxo", .name = "xo_board" },
 	{ .hw = &gpll0.clkr.hw },
 	{ .hw = &gpll4.clkr.hw },
 	{ .hw = &gpll0_early_div.hw }