[PATCH] clk: rockchip: Remove redundant null check before clk_prepare_enable

[Stephen Boyd]

Quoting Xu Wang (2020-11-27 01:05:51)
> Because clk_prepare_enable() already checked NULL clock parameter,
> so the additional check is unnecessary, just remove it.
> 
> Signed-off-by: Xu Wang <vulab at iscas.ac.cn>
> ---

Acked-by: Stephen Boyd <sboyd at kernel.org>