msm: scm-boot: move scm-boot driver to a new location in kernel

This patch moves scm-boot driver from mach-msm directory to
machine independent location in a kernel tree.

Change-Id: Ia15bbeee02957707b8504bb4131ade749bee796c
Signed-off-by: Murali Nalajala <mnalajal@codeaurora.org>