regulator: pca9450: Fix return value when failing to get sd-vsel GPIO

This fixes the return value of pca9450_i2c_probe() to use the correct
error code when getting the sd-vsel GPIO fails.

Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Link: https://lore.kernel.org/r/20210222150809.208942-1-frieder.schrempf@kontron.de


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