sh: compile fixes for header cleanup.

Since some header inclusion paths were cleaned up, compilation
broke. Add in the headers we need directly to build again.

Signed-off-by: Paul Mundt <[e-mail]>

arch/sh/kernel/time.c

···
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/profile.h>
+#include <linux/timex.h>
+#include <linux/sched.h>
 #include <asm/clock.h>
 #include <asm/rtc.h>
 #include <asm/timer.h>