drivers: usb: device: stm32: do not disable ULPI clock in run mode
drivers: usb: device: stm32: do not disable ULPI clock in run mode

The ULPI clock is disabled by default in run mode, there is no need to
disable it again. It is however enabled by default in sleep/low power
mode, so it needs to be disabled.

Signed-off-by: Aurelien Jarno <bceb368e7f2cb351af47298f32034f0587bbe4a6@aurel32.net>

galak/zephyr,galak/zephyr,finikorg/zephyr,finikorg/zephyr,galak/zephyr,galak/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,galak/zephyr