CRIS v10: kernel/time.c needs to include linux/vmstat.h to compile

This fixes compile error when nr_free_pages() from linux/swap.h
expands to global_page_state(NR_FREE_PAGES), but linux/vmstat.h isn't
included to declare global_page_state().
Signed-off-by: NJesper Nilsson <jesper.nilsson@axis.com>
Cc: Mikael Starvik <mikael.starvik@axis.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

arch/cris/arch-v10/kernel/time.c

@@ -13,6 +13,7 @@
 #include <linux/swap.h>
 #include <linux/sched.h>
 #include <linux/init.h>
+#include <linux/vmstat.h>
 #include <asm/arch/svinto.h>
 #include <asm/types.h>
 #include <asm/signal.h>