bus: sunxi-rsb: Simplify code with dev_err_probe()

Use dev_err_probe() directly in the driver probe phase. This can
simplify the code a bit.

Signed-off-by: Zhang Zekun <zhangzekun11@huawei.com>
Link: https://lore.kernel.org/r/20240905114134.80310-1-zhangzekun11@huawei.com


Signed-off-by: Chen-Yu Tsai <wens@csie.org>