ARM: clk-imx27: Fix rtc clock id

Fix rtc clock id.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
diff --git a/arch/arm/mach-imx/clk-imx27.c b/arch/arm/mach-imx/clk-imx27.c
index 295cbd7..167a3f1 100644
--- a/arch/arm/mach-imx/clk-imx27.c
+++ b/arch/arm/mach-imx/clk-imx27.c
@@ -256,7 +256,7 @@
 	clk_register_clkdev(clk[gpio_ipg_gate], "gpio", NULL);
 	clk_register_clkdev(clk[brom_ahb_gate], "brom", NULL);
 	clk_register_clkdev(clk[ata_ahb_gate], "ata", NULL);
-	clk_register_clkdev(clk[rtc_ipg_gate], "rtc", NULL);
+	clk_register_clkdev(clk[rtc_ipg_gate], NULL, "mxc_rtc");
 	clk_register_clkdev(clk[scc_ipg_gate], "scc", NULL);
 	clk_register_clkdev(clk[cpu_div], "cpu", NULL);
 	clk_register_clkdev(clk[emi_ahb_gate], "emi_ahb" , NULL);