Synchronize configs with the latest in LSI repos

LSI Kernels are buit using defconfigs here. Update them with latest
changes from LSI GitHub public repos.

Signed-off-by: Daniel Dragomir <daniel.dragomir@windriver.com>
Build KERNEL using lsi defconfigs from kernel sources

If in kernel sources exist /arch/$ARCH/configs/lsi_defconfig or lsi_rt_defconfig
(for preempt-rt), copy them in work directory to be use for kernel build.
With this we are sure that the latest defconfig is used.

Signed-off-by: Daniel Dragomir <daniel.dragomir@windriver.com>
Update to last release for LSI PUBLIC repos

Update LSI_KERNEL_TAG, LINUX_VERSION and SRCREV to build the latest
released kernels from the public repository.
For 3.10 - tag 8.8.1.30
For 3.4 - tag 7.8.1.39

Signed-off-by: Daniel Dragomir <daniel.dragomir@windriver.com>
Rename Axxia Simulation Targets for 3.10 public and private repos

For the new Device Tree for Axxia Simulation Targets, rename targets
to be able to create fit images for those new DTB (for the moment only
for LSI GitHub 3.10 repos: private and public)

Signed-off-by: Daniel Dragomir <daniel.dragomir@windriver.com>