sh: Use generic sched_clock().

The generic sched_clock() handles INITIAL_JIFFIES now as well, so we can
just use that instead.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/kernel/time.c b/arch/sh/kernel/time.c
index 0eecbe8..960d9ab 100644
--- a/arch/sh/kernel/time.c
+++ b/arch/sh/kernel/time.c
@@ -91,11 +91,6 @@
 
 void (*board_time_init)(void);
 
-unsigned long long sched_clock(void)
-{
-	return (jiffies_64 - INITIAL_JIFFIES) * (NSEC_PER_SEC / HZ);
-}
-
 void __init time_init(void)
 {
 	if (board_time_init)