MFC: r276377, r276714

• No longer exclude malo(4) and mwl(4), they have been fixed in r275870 (MFCed to stable/10 in r278415) and r275871 (MFCed to stable/10 in r278416) respectively to build with PAE enabled.
• For the PAE kernel configuration file, no longer exclude devices that are known to be 64-bit DMA clean from amd64.