ARM: dts: meson8b: correct uart_B and uart_C clock references

With the current device tree for meson8b, uarts B (e.g. available on pins
8/10 on Odroid-C1) and C (pins 3/5 on Odroid-C1) do not work, because they
are relying on incorrect clocks. Change the references of pclk to the
correct CLKID, to allow use of the two uarts.

Fixes: 3375aa77 ("ARM: dts: meson8b: Fix the UART device-tree schema validation")
Signed-off-by: Hans-Frieder Vogt <hfdevel@gmx.net>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Link: https://lore.kernel.org/r/trinity-bf20bcb9-790b-4ab9-99e3-0831ef8257f4-1680878185420@3c-app-gmx-bap55


Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>