bcm53xx: add support for Buffalo WZR-1750DHP

Let's generate a simple TRX file as we can't get encrypted one.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@42863 3c298f89-4303-0410-b956-a3cf2f4a3e73
bcm53xx: prepare to support Asus RT-N18U

DT file doesn't include any GPIOs yet, but let's add it as we got some
interest in this device on IRC.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@42864 3c298f89-4303-0410-b956-a3cf2f4a3e73