hw/mips/Kconfig: Malta machine requires the pcnet network card

This fixes when configuring with --without-default-devices:

  $ qemu-system-mips64 -bios /dev/null -M malta
  qemu-system-mips64: Unsupported NIC model: pcnet

Fixes: 7c28b925b7e
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20190316200818.8265-7-philmd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
1 file changed