usb: device: fix wrong direction in usb_transfer_ep_callback
usb: device: fix wrong direction in usb_transfer_ep_callback

In case no transfer is ongoing, the usb_transfer_ep_callback consumes
the received data. This is however associated with the wrong test. USB
is host centric, so data reception on the device is signaled by
USB_DC_EP_DATA_OUT and not USB_DC_EP_DATA_IN.

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

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