clocksource: sun4i: Wrap macros arguments in parenthesis

The macros were not using parenthesis to escape the arguments passed to
them. It is pretty unsafe, so add those parenthesis.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

drivers/clocksource/sun4i_timer.c

@@ -30,8 +30,8 @@
 #define TIMER_CTL_ENABLE		BIT(0)
 #define TIMER_CTL_AUTORELOAD		BIT(1)
 #define TIMER_CTL_ONESHOT		BIT(7)
-#define TIMER_INTVAL_REG(val)	(0x10 * val + 0x14)
-#define TIMER_CNTVAL_REG(val)	(0x10 * val + 0x18)
+#define TIMER_INTVAL_REG(val)	(0x10 * (val) + 0x14)
+#define TIMER_CNTVAL_REG(val)	(0x10 * (val) + 0x18)
 
 #define TIMER_SCAL		16