clk: sprd: Add dependency for SPRD_UMS512_CLK

Add depends on and default for ums512 clk config.

Signed-off-by: Cixi Geng <cixi.geng1@unisoc.com>
Link: https://lore.kernel.org/r/20230201091300.3201-1-cixi.geng@linux.dev


Signed-off-by: Stephen Boyd <sboyd@kernel.org>