Enable SGI UV systems.
    
    Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1051284
    
    Set CONFIG_X86_UV to 'y' and CONFIG_UV_MMTIMER to 'm' for large SGI boxes.
    These settings will enable the booting of more than 16 processors.
    
    Signed-off-by: Prarit Bhargava <prarit@redhat.com>
    Cc: glaubitz@physik.fu-berlin.de
    Cc: jwboyer@redhat.com