osinfo: Disable unsupported rtl8139 in SLES 11 for ppc64

The SLES 11 operating system does not support the rtl8139
network interface, this patch disables it in the osinfo.

Change-Id: Ia63250ec01a638e31fcb4b003d5913c0a43f8f36
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1151015
Signed-off-by: Vitor de Lima <vdelima@redhat.com>