With the commit4fcba5d556("regulator: implement basic reference counter") the return value of regulator_set_enable may be EALREADY or EBUSY for fixed/gpio regulators. Change to use the more relaxed regulator_set_enable_if_allowed to continue if regulator already was enabled or disabled. Based on335799b725("usb: dwc2: Use regulator_set_enable_if_allowed") Signed-off-by: Marek Vasut <marex@denx.de> Reviewed-by: Fabio Estevam <festevam@gmail.com> Reviewed-by: Mattijs Korpershoek <mkorpershoek@baylibre.com> (cherry picked from commitaddcb09fd5)