add prebuilt dt.img for kk using legacy dtbTool
changes for CONFIG_KEXEC as a module
add kexec block driver support
msm_kexec: add module info to stop taint
kexec: preempt_disable, turn off irqs and add logging
arch/arm/kernel/relocate_kernel: add copies of call_with_stack, cpu_proc_fin and cpu_reset
fix arm_kexec module build