usb: dwc3: drop EP0_STALL state

Whenever we issue a Set Stall command on EP0,
the state machine will be restarted and Stall
is cleared automatically, when core receives
the next SETUP packet.

There's no need to track that EP0_STALL state.

Signed-off-by: Felipe Balbi <balbi@ti.com>
3 files changed