Add rt_bus_probe_device() to retry driver matching for a registered
but unbound device. Use it when an OFW-created platform device
is requested again, while preserving native-bus ownership
for I2C, SPI, and other non-platform devices.
Also instantiate eligible child platform devices after a parent node is registered.
Signed-off-by: GuEe-GUI <2991707448@qq.com>