Revert "drm/amd/pm: fix workload mismatch on vega10"

[ Upstream commit 2fd31689 ]

This reverts commit 0979d432.
Revert this because it does not apply to all the cards.

Signed-off-by: Kenneth Feng <kenneth.feng@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>