ARM: imx7ulp: enable cpufreq

Enable cpufreq for i.MX7ULP when imx cpufreq dt driver enabled.
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Dong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/mach-imx/mach-imx7ulp.c

@@ -67,6 +67,9 @@ static const char *const imx7ulp_dt_compat[] __initconst = {
 
 static void __init imx7ulp_init_late(void)
 {
+	if (IS_ENABLED(CONFIG_ARM_IMX_CPUFREQ_DT))
+		platform_device_register_simple("imx-cpufreq-dt", -1, NULL, 0);
+
 	imx7ulp_cpuidle_init();
 }