plat/qemu: add cortex-a72 support to 'virt' platform

Cortex-A72 support is already enabled for sbsa-ref platform,
so add it also to virt platform for parity.

Change-Id: Ib0a2ce81ef7c0a71ef8dc66dbec179191bf2e6cc
Signed-off-by: Leif Lindholm <leif@nuviainc.com>
1 file changed