reform-boundary-uboot

This allows the user can easily add extra kernel arguments. Very helpful
for reserving memory for the DSP without rewriting the entire kernel
argument line.

Signed-off-by: Philip Balister <philip@opensdr.com>
Tested-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>