usb: host: oxu210hp-hcd: remove unused variable

The variable live was assigned the host controller running status but
it was never used or checked after that.

Signed-off-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>