icE1usb fw: Have usb_e1 handle the E1 polling and multi port

The init already takes care of both port and also calling
e1_init, so it makes sense to have a usb_e1_poll() that
encapsulate both the actual e1 hardware poll and running
the usb stuff for both port.

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
Change-Id: Icf81efcdc5c8f13480ba2652bc6e7c1ca226ae4d
3 files changed