powerpc/pseries/eeh: Handle functional reset on non-PCIe device

  Fundamental reset is an optional reset type supported only by PCIe adapters.
  Handle the unexpected case where a non-PCIe device has requested a
  fundamental reset. Try hot-reset as a fallback to handle this case.

Signed-off-by: Richard A Lary <rlary@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>