clk: renesas: rzg2l: Simplify the logic in rzg2l_mod_clock_endisable()

The bitmask << 16 is anyway set on both branches of if thus move it
before the if and set the lower bits of registers only in case clock is
enabled.

Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20230912045157.177966-12-claudiu.beznea.uj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

Author: claudiubeznea

drivers/clk/renesas/rzg2l-cpg.c

@@ -909,10 +909,9 @@ static int rzg2l_mod_clock_endisable(struct clk_hw *hw, bool enable)
 		enable ? "ON" : "OFF");
 	spin_lock_irqsave(&priv->rmw_lock, flags);
 
+	value = bitmask << 16;
 	if (enable)
-		value = (bitmask << 16) | bitmask;
-	else
-		value = bitmask << 16;
+		value |= bitmask;
 	writel(value, priv->base + CLK_ON_R(reg));
 
 	spin_unlock_irqrestore(&priv->rmw_lock, flags);