kernel: Fix k_poll support for k_fifo_put_list

With the recently added k_poll feature, k_fifo_put_list was forgotten
about. Add the necessary code to wake up a k_poll call when
k_fifo_put_list is called.

Change-Id: Ib9baef5ee2bd00620e2eea5afdd81accc4518bd5
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>