usb: ftdi-elan: remove redundant continue statement in a while-loop

The continue statement at the end of the while-loop is redundant,
remove it.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Addresses-Coverity: ("Continue has no effect")
Link: https://lore.kernel.org/r/20210621095545.9659-1-colin.king@canonical.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>