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

This enabled DPM support for Fiji.  DPM is dynamic
clock and voltage scaling.

v2: rename fiji_hwmgr_early_init to fiji_hwmgr_init
v3: (agd) fold in endian fix, additional function addition
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Eric Huang <JinHuiEric.Huang@amd.com>
(cherry picked from commit aabcb7c1)
Signed-off-by: Alberto Milone <alberto.milone@canonical.com>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>