eud: Handle multiple events with eud interrupt

With USB spoof connect functionality, eud hardware is generating
interrupt with status register updated with VBUS present and TX
buffer empty. Current eud ISR expects to have only single event
generated with each interrupt. It doesn't handle received valid
events. Fix this ISR logic to handle multiple events.

Change-Id: I819b8a7f5be5b32753467495416103b690a4a83e
Signed-off-by: Mayank Rana <mrana@codeaurora.org>