regulator: lp8788-buck: fix copy and paste bug in lp8788_dvs_gpio_request()

"gpio2" as intended here, not "gpio1".

Fixes: 95daa868 ("regulator: lp8788-buck: Fully convert to GPIO descriptors")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://msgid.link/r/19f62cc2-bdcf-46f7-a5c5-971ef05e1ea7@moroto.mountain


Signed-off-by: Mark Brown <broonie@kernel.org>