ARM i.MX25 clk: Fix gpt timer clock.

The gpt0 timer clock has been wrong since:
  6bbaec56 ARM i.MX25: implement clocks using common clock framework
Signed-off-by: Denis Carikli <denis@eukrea.com>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Shawn Guo <shawn.guo@freescale.com>

arch/arm/mach-imx/clk-imx25.c

@@ -242,7 +242,7 @@ int __init mx25_clocks_init(void)
 {
 	__mx25_clocks_init(24000000);
 
-	clk_register_clkdev(clk[ipg], "ipg", "imx-gpt.0");
+	clk_register_clkdev(clk[gpt1_ipg], "ipg", "imx-gpt.0");
 	clk_register_clkdev(clk[gpt_ipg_per], "per", "imx-gpt.0");
 	/* i.mx25 has the i.mx21 type uart */
 	clk_register_clkdev(clk[uart1_ipg], "ipg", "imx21-uart.0");