Add initial SMU 13.0.6 implementation.

v1:
Initial implementation to support SMU 13.0.6.
v2:
Add driver interface version check.
v3: rebase (Alex)
v4: Enable i2c for avoid warning (Alex)
v5: sqaush in cleanups up through (Alex)
    "drm/amd/pm: Ignore EIO error on SMUv13.0.6"
Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>