Revert "PCI/AER: Support errors introduced by PCIe r6.0"

This reverts commit 5533169b which is
commit 66338752 upstream.

It breaks the Android kernel abi and can be brought back in the future
in an abi-safe way if it is really needed.

Bug: 161946584
Change-Id: I4846eb396bb9e1847f4cb5fc5881909f8255ddc7
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>