device property: Use fwnode_property_string_array_count()

Use fwnode_property_string_array_count() instead of open coded variant.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Rafael J. Wysocki <rafael@kernel.org>
Link: https://lore.kernel.org/r/20230808162800.61651-2-andriy.shevchenko@linux.intel.comSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/base/property.c

@@ -473,7 +473,7 @@ int fwnode_property_match_string(const struct fwnode_handle *fwnode,
 	const char **values;
 	int nval, ret;
 
-	nval = fwnode_property_read_string_array(fwnode, propname, NULL, 0);
+	nval = fwnode_property_string_array_count(fwnode, propname);
 	if (nval < 0)
 		return nval;