soc: xilinx: vcu: issue with 2nd null check on pointer divider

["Colin King (gmail)" <colin.i.king@gmail.com>]

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Hi,

There seems to be an issue with the following function with the second 
check on if (!divider). Firstly this is redundant code since divider has
already been null checked, so I suspect it should be instead if (!mux) 
but I'm unsure if this is correct since the call to 
clk_hw_unregister_divider is not made.  Also if mux is null, isn't the 
call to clk_hw_unregister_mux() problematic as a null pointer is being 
passed to it.

static void xvcu_clk_hw_unregister_leaf(struct clk_hw *hw)
{
         struct clk_hw *gate = hw;
         struct clk_hw *divider;
         struct clk_hw *mux;

         if (!gate)
                 return;

         divider = clk_hw_get_parent(gate);
         clk_hw_unregister_gate(gate);
         if (!divider)
                 return;

         mux = clk_hw_get_parent(divider);
         clk_hw_unregister_mux(mux);
         if (!divider)
                 return;

         clk_hw_unregister_divider(divider);
}

Colin

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