linux-yocto: Add support for 3.10 Kernel version

Add receipes, inc files and defconfigs (for elpaso, axm5500 and axm5500sim)
to be able to build 3.10 Kernel version.
For testing, use local git repository for Kernel sources.
The plan is to use LSI Github repositories.

Signed-off-by: Paul Butler <paul.butler@windriver.com>