BACKPORT: driver core: fw_devlink: Add support for batching fwnode parsing

The amount of time spent parsing fwnodes of devices can become really
high if the devices are added in an non-ideal order. Worst case can be
O(N^2) when N devices are added. But this can be optimized to O(N) by
adding all the devices and then parsing all their fwnodes in one batch.

This commit adds fw_devlink_pause() and fw_devlink_resume() to allow
doing this.

Signed-off-by: Saravana Kannan <saravanak@google.com>
Link: https://lore.kernel.org/r/20200515053500.215929-4-saravanak@google.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 716a7a25969003d82ab738179c3f1068a120ed11)
[fixed conflicts due to fw_devlink and fw_devlink permissive mode]
Bug: 157691602
Signed-off-by: Saravana Kannan <saravanak@google.com>
Change-Id: Ibcc32eee577c9325054786a73193d615d54a8f07