x86: Move i8254_init() to x86_cpu_init_f()

Right now i8254_init() is called from timer_init() in the tsc timer
driver. But actually i8254 and tsc are completely different things.
Since tsc timer has been converted to driver model, we should find
a new place that is appropriate for U-Boot to call i8254_init(),
which is now x86_cpu_init_f().

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>

arch/x86/cpu/cpu.c

@@ -399,6 +399,11 @@ int x86_cpu_init_f(void)
 		}
 	}
 
+#ifdef CONFIG_I8254_TIMER
+	/* Set up the i8254 timer if required */
+	i8254_init();
+#endif
+
 	return 0;
 }
 

drivers/timer/tsc_timer.c

@@ -325,16 +325,6 @@ void __udelay(unsigned long usec)
 #endif
 }
 
-int timer_init(void)
-{
-#ifdef CONFIG_I8254_TIMER
-	/* Set up the i8254 timer if required */
-	i8254_init();
-#endif
-
-	return 0;
-}
-
 static int tsc_timer_get_count(struct udevice *dev, u64 *count)
 {
 	u64 now_tick = rdtsc();