ipq806x: gcc: add support for child probe

Add support for child probing needed for tsens driver that share the
same regs of gcc for this platform.
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Reviewed-by: Amit Kucheria <amit.kucheria@linaro.org>
Link: https://lore.kernel.org/r/20200716022817.30439-2-ansuelsmth@gmail.comSigned-off-by: Stephen Boyd <sboyd@kernel.org>

drivers/clk/qcom/gcc-ipq806x.c

@@ -3089,7 +3089,7 @@ static int gcc_ipq806x_probe(struct platform_device *pdev)
 	regmap_write(regmap, 0x3cf8, 8);
 	regmap_write(regmap, 0x3d18, 8);
 
-	return 0;
+	return of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev);
 }
 
 static struct platform_driver gcc_ipq806x_driver = {