[PATCH 03/31] clk: mediatek: gate: Internalize clk implementation

[Miles Chen]

> struct mtk_clk_gate and mtk_clk_register_gate() are not used outside of
> the gate clk library. Only the API that handles a list of clks is used
> by the individual platform clk drivers.
> 
> Internalize the parts that aren't used outside of the implementation.
> 
> Signed-off-by: Chen-Yu Tsai <wenst at chromium.org>
>
Reviewed-by: Miles Chen <miles.chen at mediatek.com>