BugLink: http://bugs.launchpad.net/bugs/1546572

in dpm module, sysfs init func move to late_init from sw_init.
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>

Change-Id: Ice4a73212d8e3106d05f04a27043820ffd32929e
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
(cherry picked from commit 7ad4e7f0)
Signed-off-by: Alberto Milone <alberto.milone@canonical.com>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>