ARM i.MX: remove now unnecessary argument from mxc_timer_init

As the timer code now does a clk_get to get its clock we don't
need the struct clk argument anymore.
This also changes the alternative EPIT timer to do a clk_get.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

arch/arm/mach-imx/clk-imx1.c

@@ -108,8 +108,7 @@ int __init mx1_clocks_init(unsigned long fref)
 	clk_register_clkdev(clk[clk32], NULL, "mxc_rtc.0");
 	clk_register_clkdev(clk[clko], "clko", NULL);
 
-	mxc_timer_init(NULL, MX1_IO_ADDRESS(MX1_TIM1_BASE_ADDR),
-			MX1_TIM1_INT);
+	mxc_timer_init(MX1_IO_ADDRESS(MX1_TIM1_BASE_ADDR), MX1_TIM1_INT);
 
 	return 0;
 }