clocksource/drivers/sun4i: Add definition of clear interrupt

To prevent misunderstanding, use TIMER_IRQ_CLEAR instead of TIMER_IRQ_EN
in function sun4i_timer_clear_interrupt.

Signed-off-by: Victor Hassan <[e-mail]>
Acked-by: Jernej Skrabec <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Daniel Lezcano <[e-mail]>

drivers/clocksource/timer-sun4i.c

···
 #define TIMER_IRQ_EN_REG	0x00
 #define TIMER_IRQ_EN(val)		BIT(val)
 #define TIMER_IRQ_ST_REG	0x04
+#define TIMER_IRQ_CLEAR(val)		BIT(val)
 #define TIMER_CTL_REG(val)	(0x10 * val + 0x10)
 #define TIMER_CTL_ENABLE		BIT(0)
 #define TIMER_CTL_RELOAD		BIT(1)
···
 
 static void sun4i_timer_clear_interrupt(void __iomem *base)
 {
-	writel(TIMER_IRQ_EN(0), base + TIMER_IRQ_ST_REG);
+	writel(TIMER_IRQ_CLEAR(0), base + TIMER_IRQ_ST_REG);
 }
 
 static irqreturn_t sun4i_timer_interrupt(int irq, void *dev_id)