[PATCH 1/1 v4] arm: fault.c: Port OOM changes into do_page_fault

[kautuk.c @samsung.com]

I got some time to do some more self-review and I spotted one
redundant piece of code in this patch
related to VM_FAULT_ERROR handling.

So I have resent as version 5.

Uh.. is there something fundamentally wrong with this patch ?