backlight: l4f00242t03: Simplify with dev_err_probe()

Common pattern of handling deferred probe can be simplified with
dev_err_probe().  Less code and also it prints the error value.

Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240305-backlight-probe-v2-2-609b0cf24bde@linaro.org


Signed-off-by: Lee Jones <lee@kernel.org>