clk: renesas: cpg-mssr: Remove obsolete nullify check

All core clock nullify users and helpers were removed in commit
b1dec4e785 ("clk: renesas: rcar-gen3: Disable R-Car H3 ES1.*"),
but the CPG/MSSR driver still checks for nullified core clocks.
Remove the obsolete check.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/59ef3eccde0b0b63626480f27e77d5c68948ca98.1740126560.git.geert+renesas@glider.be

drivers/clk/renesas/renesas-cpg-mssr.c

@@ -338,11 +338,6 @@ static void __init cpg_mssr_register_core_clk(const struct cpg_core_clk *core,
 	WARN_DEBUG(id >= priv->num_core_clks);
 	WARN_DEBUG(PTR_ERR(priv->clks[id]) != -ENOENT);
 
-	if (!core->name) {
-		/* Skip NULLified clock */
-		return;
-	}
-
 	switch (core->type) {
 	case CLK_TYPE_IN:
 		clk = of_clk_get_by_name(priv->np, core->name);