Remove the following files:
* src/dev/virtio/rng 2.cc
* src/dev/virtio/rng 2.hh
Which were a copy of rng.hh and rng.cc. Probably added to the repository
by accident. They were not compiled by scons
Change-Id: I9d1da19cc243c513ab7af887b1b6260d8e361b57
Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com>