Fix i82975x_edac (BZ#848149)
    
    This driver was soooo broken that I needed to rewrote the
    entire logic for memory identification and for memory error
    report.
    
    While here, enable EDAC_DEBUG, on debug kernels.
    
    Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>