This source tree uses the older ralink driver as the newer version is not compatible with the 2.4.26-ts11 
tree.  The TS-7400 can be built by a cross toolchain.  However, due to glibc incompatibilities, the generic 
72xx (TS-7200, TS-7250, TS-7260, TS-7300 and all derivatives) must be built from a native toolchain on the 
TS-7300.  The sources for the ralink driver and kernel source can either be local on SD or mounted via NFS.

In order to compile for TS-7400, issue the following command:
make clean && BOARD=7400 make

Make sure the cross compiler and linux src tree are correctly set in the Makefile
The linux sources NEED to have "2.4" in the path string, this is how the ralink Makefile determines what kernel version to use.
