ARM: imx: remove platform headers from timer driver

With the cleanup done before, the platform specific headers now can be
removed.
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>

arch/arm/mach-imx/time.c

@@ -36,9 +36,6 @@
 
 #include <asm/mach/time.h>
 
-#include "common.h"
-#include "hardware.h"
-
 /*
  * There are 4 versions of the timer hardware on Freescale MXC hardware.
  *  - MX1/MXL
@@ -80,9 +77,6 @@
 
 #define V2_TIMER_RATE_OSC_DIV8	3000000
 
-#define timer_is_v1()	(cpu_is_mx1() || cpu_is_mx21() || cpu_is_mx27())
-#define timer_is_v2()	(!timer_is_v1())
-
 struct imx_timer {
 	enum imx_gpt_type type;
 	void __iomem *base;