xhci: remove redundant continue statement

The continue statement at the end of a for-loop has no effect,
remove it.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Addresses-Coverity: ("Continue has no effect")
Cc: Mathias Nyman <mathias.nyman@intel.com>
Link: https://lore.kernel.org/r/20210618090447.99114-1-colin.king@canonical.com


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