Silicon/NXP/LS1043A: Move SocLib to Soc Package

The SocLib contains code specific to an Soc. it should be part of
SOC package.
Therefore, move the SocLib to Soc Package.
Since we are moving the files to Soc Package, no need to mention the
Soc name in file names. Their location is enough to indicate for which
Soc the files are.

Signed-off-by: Pankaj Bansal <pankaj.bansal@nxp.com>
Reviewed-by: Leif Lindholm <leif@nuviainc.com>