ARM: OMAP: 2430 PM: emul_ck is only available on 242x

omap2_pm_init: on 2430,  don't fail if emul_ck is not available.  It
is only available on 2420
Signed-off-by: Kevin Hilman <khilman@mvista.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/pm.c

@@ -783,12 +783,14 @@ int __init omap2_pm_init(void)
 		return -ENODEV;
 	}
 
+	if (cpu_is_omap242x()) {
 		emul_ck = clk_get(NULL, "emul_ck");
 		if (IS_ERR(emul_ck)) {
 			printk(KERN_ERR "could not get emul_ck\n");
 			clk_put(osc_ck);
 			return -ENODEV;
 		}
+	}
 
 	prcm_setup_regs();