[PATCH] tree wide: Use kvfree() than conditional kfree()/vfree()

[Luck, Tony]

> ACK for the ACPI changes (and CCing Tony and Boris for the heads-up as they
> are way more famailiar with the APEI code than I am).

Sure. If kvfree() really is smart enough to figure it out then there
it no point in the if (blah) kfree() else vfree().

The drivers/acpi/apei/erst.c code isn't doing anything subtle or magic here.

-Tony