realview: disable SWP emulation

This is not needed since our toolchain produces the expected binaries for the
target CPU.

Signed-off-by: Florian Fainelli <florian@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@41494 3c298f89-4303-0410-b956-a3cf2f4a3e73
realview: set LAN interface to be in DHCP

Realview is mostly used as a QEMU development platform, which will provide a
built-in DHCP server to NAT or bridge the connection outside of the emulated
environment.

Signed-off-by: Florian Fainelli <florian@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@41495 3c298f89-4303-0410-b956-a3cf2f4a3e73