clk: mvebu: ap806: Remove superfluous of_clk_add_provider

While applying the commit a8309ced ("clk: apn806: Add eMMC clock to
system controller driver"), of_clk_add_provider was added wheres it was
already present in the probe function.

This extraneous call is harmless but not useful so remove it.
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

drivers/clk/mvebu/ap806-system-controller.c

@@ -155,7 +155,6 @@ static int ap806_syscon_common_probe(struct platform_device *pdev,
 		goto fail4;
 	}
 
-	of_clk_add_provider(np, of_clk_src_onecell_get, &ap806_clk_data);
 	ret = of_clk_add_provider(np, of_clk_src_onecell_get, &ap806_clk_data);
 	if (ret)
 		goto fail_clk_add;