drm/amd/powerplay: fix memory leakage when reload (v2)

drm/amd/powerplay: fix memory leakage when reload (v2)

[ Upstream commit a25513e7b9b15c318ec44113682e988829aef746 ]

add smu_free_memory when smu fini to prevent memory leakage

v2: squash in typo fix (Yintian) and warning (Harry)

Signed-off-by: Yintian Tao <yttao@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>