[PATCH v3] of: fix kmemleak crash caused by imbalance in early memory reservation

[Mike Rapoport]

Hi,

Hopefully this time everything is sorted out.

I've dropped cc @stable for now, it anyway won't apply. I'll resend the
previous version to @stable if needed.

v3 changes:
* rebased vs current mmotm
* dropped unreachable 'return 0'
* updated the commit message to match the actual change