powerpc/kvm: update KVM config options in ppc44x_defconfig

KVM host support was recently enabled in ppc44x_defconfig, but since then the
config option was renamed. Update ppc44x_defconfig to match.

Also, KVM guests aren't very interesting without networking, so enable
CONFIG_TUN and CONFIG_BRIDGE.
Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>

arch/powerpc/configs/ppc44x_defconfig

@@ -354,7 +354,7 @@ CONFIG_IPV6_NDISC_NODETYPE=y
 # CONFIG_IP_SCTP is not set
 # CONFIG_TIPC is not set
 # CONFIG_ATM is not set
-# CONFIG_BRIDGE is not set
+CONFIG_BRIDGE=m
 # CONFIG_NET_DSA is not set
 # CONFIG_VLAN_8021Q is not set
 # CONFIG_DECNET is not set
@@ -579,7 +579,7 @@ CONFIG_NETDEVICES=y
 # CONFIG_BONDING is not set
 # CONFIG_MACVLAN is not set
 # CONFIG_EQUALIZER is not set
-# CONFIG_TUN is not set
+CONFIG_TUN=m
 # CONFIG_VETH is not set
 # CONFIG_ARCNET is not set
 # CONFIG_PHYLIB is not set
@@ -1418,6 +1418,6 @@ CONFIG_CRYPTO_LZO=m
 # CONFIG_PPC_CLOCK is not set
 CONFIG_VIRTUALIZATION=y
 CONFIG_KVM=y
-CONFIG_KVM_BOOKE_HOST=y
+CONFIG_KVM_440=y
 # CONFIG_VIRTIO_PCI is not set
 # CONFIG_VIRTIO_BALLOON is not set