drm/amdgpu: add mes resume when do gfx post soft reset

drm/amdgpu: add mes resume when do gfx post soft reset

BugLink: https://bugs.launchpad.net/bugs/2017219
[ Upstream commit 4eb0b49a0ad3e004a6a65b84efe37bc7e66d560f ]

[why]
when gfx do soft reset, mes will also do reset, if mes is not
resumed when do recover from soft reset, mes is unable to respond
in later sequence

[how]
resume mes when do gfx post soft reset

Signed-off-by: Tong Liu01 <Tong.Liu01@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Paolo Pisati <paolo.pisati@canonical.com>