mfd: rk808: Use dev_err_probe

mfd: rk808: Use dev_err_probe

Use dev_err_probe instead of dev_err in probe function,
which simplifies code a little bit and prints the error
code.

Also drop possibly incorrect printing of chip id registers
while touching the error message.

Tested-by: Diederik de Haas <didi.debian@cknow.org> # Rock64, Quartz64 Model A + B
Tested-by: Vincent Legoll <vincent.legoll@gmail.com> # Pine64 QuartzPro64
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Link: https://lore.kernel.org/r/20230504173618.142075-4-sebastian.reichel@collabora.com
Signed-off-by: Lee Jones <lee@kernel.org>