rockchip: arm64: rk3399: remove unconditional debug message

rockchip: arm64: rk3399: remove unconditional debug message

An earlier upstream change contained an unconditional debug message
which would show up as a message similar to the following in the
U-Boot startup (after the ATF and before the U-Boot banner):
      time 159f019, 0

This commit removes this message (instead of making if conditional on
being a debug-build), as it doesn't pertain to any initialisation done
in this file.

Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Acked-by: Simon Glass <sjg@chromium.org>