clocksource/drivers/samsung_pwm: Constify passed structure

The 'struct samsung_pwm_variant' argument passed to initialization
functions is not modified, so it can be made const for safety.

Signed-off-by: Krzysztof Kozlowski <[e-mail]>
Signed-off-by: Daniel Lezcano <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

drivers/clocksource/samsung_pwm_timer.c

···
 
 void __init samsung_pwm_clocksource_init(void __iomem *base,
 					 unsigned int *irqs,
-					 struct samsung_pwm_variant *variant)
+					 const struct samsung_pwm_variant *variant)
 {
 	pwm.base = base;
 	memcpy(&pwm.variant, variant, sizeof(pwm.variant));

include/clocksource/samsung_pwm.h

···
 
 void samsung_pwm_clocksource_init(void __iomem *base,
 				  unsigned int *irqs,
-				  struct samsung_pwm_variant *variant);
+				  const struct samsung_pwm_variant *variant);
 
 #endif /* __CLOCKSOURCE_SAMSUNG_PWM_H */