clk: renesas: rzg2l: Simplify .determine_rate()

rzg2l_cpg_sd_clk_mux_determine_rate() is the same as
__clk_mux_determine_rate_closest(), so use the latter to save some LoC.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/fed02e0325275df84e2d76f8c481e40e7023cbd9.1688760372.git.christophe.jaillet@wanadoo.frSigned-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

drivers/clk/renesas/rzg2l-cpg.c

@@ -182,12 +182,6 @@ rzg2l_cpg_mux_clk_register(const struct cpg_core_clk *core,
 	return clk_hw->clk;
 }
 
-static int rzg2l_cpg_sd_clk_mux_determine_rate(struct clk_hw *hw,
-					       struct clk_rate_request *req)
-{
-	return clk_mux_determine_rate_flags(hw, req, CLK_MUX_ROUND_CLOSEST);
-}
-
 static int rzg2l_cpg_sd_clk_mux_set_parent(struct clk_hw *hw, u8 index)
 {
 	struct sd_hw_data *hwdata = to_sd_hw_data(hw);
@@ -250,7 +244,7 @@ static u8 rzg2l_cpg_sd_clk_mux_get_parent(struct clk_hw *hw)
 }
 
 static const struct clk_ops rzg2l_cpg_sd_clk_mux_ops = {
-	.determine_rate = rzg2l_cpg_sd_clk_mux_determine_rate,
+	.determine_rate = __clk_mux_determine_rate_closest,
 	.set_parent	= rzg2l_cpg_sd_clk_mux_set_parent,
 	.get_parent	= rzg2l_cpg_sd_clk_mux_get_parent,
 };