clk: mediatek: clk-gate: Use regmap_{set/clear}_bits helpers

Appropriately change calls to regmap_update_bits() with regmap_set_bits()
and regmap_clear_bits() for improved readability.
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20220103143712.46675-2-angelogioacchino.delregno@collabora.comReviewed-by: Chen-Yu Tsai <wenst@chromium.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

drivers/clk/mediatek/clk-gate.c

@@ -53,17 +53,15 @@ static void mtk_cg_clr_bit(struct clk_hw *hw)
 static void mtk_cg_set_bit_no_setclr(struct clk_hw *hw)
 {
 	struct mtk_clk_gate *cg = to_mtk_clk_gate(hw);
-	u32 cgbit = BIT(cg->bit);
 
-	regmap_update_bits(cg->regmap, cg->sta_ofs, cgbit, cgbit);
+	regmap_set_bits(cg->regmap, cg->sta_ofs, BIT(cg->bit));
 }
 
 static void mtk_cg_clr_bit_no_setclr(struct clk_hw *hw)
 {
 	struct mtk_clk_gate *cg = to_mtk_clk_gate(hw);
-	u32 cgbit = BIT(cg->bit);
 
-	regmap_update_bits(cg->regmap, cg->sta_ofs, cgbit, 0);
+	regmap_clear_bits(cg->regmap, cg->sta_ofs, BIT(cg->bit));
 }
 
 static int mtk_cg_enable(struct clk_hw *hw)