clk: renesas: mstp: Always use readl()/writel()

On arm32, there is no reason to use the (soon deprecated)
clk_readl()/clk_writel().  Hence use the generic readl()/writel()
instead.
Signed-off-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: NSimon Horman <horms+renesas@verge.net.au>

drivers/clk/renesas/clk-mstp.c

@@ -64,13 +64,13 @@ struct mstp_clock {
 static inline u32 cpg_mstp_read(struct mstp_clock_group *group,
 				u32 __iomem *reg)
 {
-	return group->width_8bit ? readb(reg) : clk_readl(reg);
+	return group->width_8bit ? readb(reg) : readl(reg);
 }
 
 static inline void cpg_mstp_write(struct mstp_clock_group *group, u32 val,
 				  u32 __iomem *reg)
 {
-	group->width_8bit ? writeb(val, reg) : clk_writel(val, reg);
+	group->width_8bit ? writeb(val, reg) : writel(val, reg);
 }
 
 static int cpg_mstp_clock_endisable(struct clk_hw *hw, bool enable)