Revert "staging: ozwpan: remove scheduling while atomic"

Revert "staging: ozwpan: remove scheduling while atomic"

This reverts commit 3e6733bb4f62148b38af8ccbe56dc0e62a052138.
An improvised fix for this is provided by Atmel with patch
"staging: ozwpan: kobject_uevent_env() from process context"
which is submitted separately.

Reviewed-on: http://git-master/r/425001
(cherry picked from commit 2b0b08d23de2a59275c276df87f2b11237f833e9)

Change-Id: I91ded7b515dea4a9fd75a04fd98b66f67f789504
Signed-off-by: Vinayak Pane <vpane@nvidia.com>
Reviewed-on: http://git-master/r/426902
Reviewed-by: Bibhay Ranjan <bibhayr@nvidia.com>
Tested-by: Bibhay Ranjan <bibhayr@nvidia.com>
Reviewed-by: Mitch Luban <mluban@nvidia.com>
GVS: Gerrit_Virtual_Submit