Revert "yenta free_irq on suspend"

ACPI is wrong.  Devices should not release their IRQ's on suspend and
re-aquire them on resume.  ACPI should just re-init the IRQ controller
instead of breaking most drivers very subtly.

Breakage reported by Hugh Dickins <hugh@veritas.com>

Undo: d8c4b419

Signed-off-by: Linus Torvalds <torvalds@osdl.org>