ARM: dts: add bus to rockchip amba nodenames

ARM: dts: add bus to rockchip amba nodenames

A test with the command below gives for example this error:

arch/arm/boot/dts/rk3188-bqedison2qc.dt.yaml: amba: $nodename:0:
'amba' does not match '^(bus|soc|axi|ahb|apb)(@[0-9a-f]+)?$'

AMBA is a open standard for the connection and
management of functional blocks in a SoC.
It's compatible with 'simple-bus', so fix this error
by adding 'bus' to all Rockchip 'amba' nodes.

make ARCH=arm dtbs_check
DT_SCHEMA_FILES=~/.local/lib/python3.5/site-packages/dtschema/
schemas/simple-bus.yaml

Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Link: https://lore.kernel.org/r/20200302153047.17101-1-jbx6244@gmail.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>