clk: rockchip: rk3399: expose PCLK_COREDBG_{B,L}

We have DT IDs for PCLK_COREDBG_L and PCLK_COREDBG_B, but we don't
actually expose them.

Note that this requires the previous patch (making "armclkl" and
"armclkb" into "critical" clocks) to prevent these clocks from taking
down the CPU.

Reviewed-by: Chen-Yu Tsai <wenst@chromium.org>
Signed-off-by: Brian Norris <briannorris@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20210908111337.v2.2.If29cd838efbcee4450a62b8d84a99b23c86e0a3f@changeid


Signed-off-by: Heiko Stuebner <heiko@sntech.de>