[PATCH v5 3/8] clk: rockchip: rk3399: add ddrc clock support

add ddrc clock setting, so we can do ddr frequency scaling on rk3399 platform in future. Signed-off-by: Lin Huang --- Changes in v5: - fit for the ddr type Changes in v4: - None Changes in v3: - None Changes in v2: - remove clk_ddrc_dpll_src from critical clock list

[PATCH v5 3/8] clk: rockchip: rk3399: add ddrc clock support

add ddrc clock setting, so we can do ddr frequency scaling on rk3399 platform in future. Signed-off-by: Lin Huang --- Changes in v5: - fit for the ddr type Changes in v4: - None Changes in v3: - None Changes in v2: - remove clk_ddrc_dpll_src from critical clock list Changes in v1: - remove