Add node to support all the QUP UART node controller inside of IPQ6018.
Some routers use these bus to connect Bluetooth chips.
Signed-off-by: Chukun Pan <amadeus@jmu.edu.cn>
Link: https://lore.kernel.org/r/20231203153914.532654-1-amadeus@jmu.edu.cnSigned-off-by: Bjorn Andersson <andersson@kernel.org>