cpufreq: dt: Add support for zx296718

Add the compatible string for supporting the generic cpufreq driver on
the ZTE's zx296718 SoC.

Signed-off-by: Baoyou Xie <baoyou.xie@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/cpufreq/cpufreq-dt-platdev.c

@@ -94,6 +94,8 @@ static const struct of_device_id machines[] __initconst = {
 
 	{ .compatible = "xlnx,zynq-7000", },
 
+	{ .compatible = "zte,zx296718", },
+
 	{ }
 };