sparc64: Fix prototype warning for sched_clock

Fix the following warning:
arch/sparc/kernel/time_64.c:880:20: warning: no previous prototype for ‘sched_clock’

Add the missing include to pick up the prototype.

Signed-off-by: Sam Ravnborg <[email protected]>
Cc: Andreas Larsson <[email protected]>
Cc: David S. Miller <[email protected]>
Reviewed-by: Andreas Larsson <[email protected]>
Tested-by: Andreas Larsson <[email protected]>
Acked-by: Arnd Bergmann <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Andreas Larsson <[email protected]>

Author: sravnborg

arch/sparc/kernel/time_64.c

@@ -33,6 +33,7 @@
 #include <linux/clockchips.h>
 #include <linux/clocksource.h>
 #include <linux/platform_device.h>
+#include <linux/sched/clock.h>
 #include <linux/ftrace.h>
 
 #include <asm/oplib.h>