drm/radeon: allow to force hard GPU reset.

drm/radeon: allow to force hard GPU reset.

In some cases, like when freezing for hibernation, we need to be
able to force hard reset even if no engine are stuck. This patch
add a bool option to current asic reset callback to allow to force
hard reset on asic that supports it.

Reviewed-by: Christian König <[email protected]>
Signed-off-by: Jérôme Glisse <[email protected]>
Cc: Alex Deucher <[email protected]>
Cc: Christian König <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>