drivers: usb_dc_stm32: add support for SoF event
drivers: usb_dc_stm32: add support for SoF event

Add support for SoF events to the USB STM32 device driver. When
CONFIG_USB_DEVICE_SOF is enabled, enable the corresponding interrupt
and provide a non-weak callback function calling status_cb.

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

ldts/zephyr,finikorg/zephyr,nashif/zephyr,zephyrproject-rtos/zephyr,punitvara/zephyr,punitvara/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,nashif/zephyr,nashif/zephyr,zephyrproject-rtos/zephyr,nashif/zephyr,ldts/zephyr,explora26/zephyr,punitvara/zephyr,galak/zephyr,explora26/zephyr,finikorg/zephyr,galak/zephyr,Vudentz/zephyr,GiulianoFranchetto/zephyr,Vudentz/zephyr,punitvara/zephyr,explora26/zephyr,zephyrproject-rtos/zephyr,GiulianoFranchetto/zephyr,GiulianoFranchetto/zephyr,GiulianoFranchetto/zephyr,ldts/zephyr,finikorg/zephyr,galak/zephyr,ldts/zephyr,finikorg/zephyr,punitvara/zephyr,galak/zephyr,explora26/zephyr,GiulianoFranchetto/zephyr,zephyrproject-rtos/zephyr,ldts/zephyr,galak/zephyr,nashif/zephyr,explora26/zephyr,Vudentz/zephyr,Vudentz/zephyr,Vudentz/zephyr,Vudentz/zephyr