ARM64: dts: rockchip: Remove 'veyron' in kevin/gru compatible

ARM64: dts: rockchip: Remove 'veyron' in kevin/gru compatible

Veyron was an rk3288 board.  Having it in the compatible doesn't make a
ton of sense.  We'll stick 'gru' in the kevin name, though, since that
sorta makes sense.  Not that we ever really fall back to this stuff.

BUG=None
TEST=Build and boot

Change-Id: Ia4b6e02bd9b160c0b20e5459ca441047add2c0bd
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-on: https://chrome-internal-review.googlesource.com/256508
Commit-Ready: Doug Anderson <dianders@google.com>
Tested-by: Doug Anderson <dianders@google.com>
Reviewed-by: Brian Norris <briannorris@google.com>
Signed-off-by: Caesar Wang <wxt@rock-chips.com>