clk: renesas: cpg-mssr: Use genpd of_node instead of local copy

Since commit 6a0ae73d95956f7e ("PM / Domain: Add support to parse
domain's OPP table"), of_genpd_add_provider_simple() fills in
the dev.of_node field in the generic_pm_domain structure.

Hence cpg_mssr_is_pm_clk() can use that instead of its own copy in the
driver-private cpg_mssr_clk_domain structure.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
diff --git a/drivers/clk/renesas/renesas-cpg-mssr.c b/drivers/clk/renesas/renesas-cpg-mssr.c
index 0201809..d105420 100644
--- a/drivers/clk/renesas/renesas-cpg-mssr.c
+++ b/drivers/clk/renesas/renesas-cpg-mssr.c
@@ -447,7 +447,6 @@ static void __init cpg_mssr_register_mod_clk(const struct mssr_mod_clk *mod,
 
 struct cpg_mssr_clk_domain {
 	struct generic_pm_domain genpd;
-	struct device_node *np;
 	unsigned int num_core_pm_clks;
 	unsigned int core_pm_clks[0];
 };
@@ -459,7 +458,7 @@ static bool cpg_mssr_is_pm_clk(const struct of_phandle_args *clkspec,
 {
 	unsigned int i;
 
-	if (clkspec->np != pd->np || clkspec->args_count != 2)
+	if (clkspec->np != pd->genpd.dev.of_node || clkspec->args_count != 2)
 		return false;
 
 	switch (clkspec->args[0]) {
@@ -549,7 +548,6 @@ static int __init cpg_mssr_add_clk_domain(struct device *dev,
 	if (!pd)
 		return -ENOMEM;
 
-	pd->np = np;
 	pd->num_core_pm_clks = num_core_pm_clks;
 	memcpy(pd->core_pm_clks, core_pm_clks, pm_size);