[PATCH v2 01/11] clk: mediatek: Make mtk_clk_register_composite() static

[Miles Chen]

> mtk_clk_register_composite() is not used anywhere outside of the file it
> is defined.
> 
> Make it static.
> 
> Fixes: 9741b1a68035 ("clk: mediatek: Add initial common clock support for Mediatek SoCs.")
> Signed-off-by: Chen-Yu Tsai <wenst at chromium.org>

Reviewed-by: Miles Chen <miles.chen at mediatek.com>