common: Move get_tbclk() to time.h

This function related to timer and most of the timer functions are in
time.h, so move this function there.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/board/armltd/integrator/timer.c b/board/armltd/integrator/timer.c
index e65ae99..d701669 100644
--- a/board/armltd/integrator/timer.c
+++ b/board/armltd/integrator/timer.c
@@ -153,7 +153,7 @@
  * Return the timebase clock frequency
  * i.e. how often the timer decrements
  */
-ulong get_tbclk (void)
+ulong get_tbclk(void)
 {
 	unsigned long long tmp = CONFIG_SYS_HZ_CLOCK;
 
diff --git a/board/freescale/qemu-ppce500/qemu-ppce500.c b/board/freescale/qemu-ppce500/qemu-ppce500.c
index b9c7146..e804cfe 100644
--- a/board/freescale/qemu-ppce500/qemu-ppce500.c
+++ b/board/freescale/qemu-ppce500/qemu-ppce500.c
@@ -9,6 +9,7 @@
 #include <env.h>
 #include <init.h>
 #include <pci.h>
+#include <time.h>
 #include <asm/processor.h>
 #include <asm/mmu.h>
 #include <asm/fsl_pci.h>
@@ -337,7 +338,7 @@
 	return 0;
 }
 
-unsigned long get_tbclk (void)
+unsigned long get_tbclk(void)
 {
 	void *fdt = get_fdt_virt();
 	int cpus_node = fdt_path_offset(fdt, "/cpus");