clocksource/drivers/loongson1: Set variable ls1x_timer_lock storage-class-specifier to static

smatch reports
drivers/clocksource/timer-loongson1-pwm.c:31:1: warning: symbol
  'ls1x_timer_lock' was not declared. Should it be static?

This variable is only used in its defining file, so it should be static.

Signed-off-by: Tom Rix <[email protected]>
Acked-by: Keguang Zhang <[email protected]>
Signed-off-by: Daniel Lezcano <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: Tom Rix

drivers/clocksource/timer-loongson1-pwm.c

@@ -28,7 +28,7 @@
 
 #define CNTR_WIDTH		24
 
-DEFINE_RAW_SPINLOCK(ls1x_timer_lock);
+static DEFINE_RAW_SPINLOCK(ls1x_timer_lock);
 
 struct ls1x_clocksource {
 	void __iomem *reg_base;