drm/amdgpu: Increase reset counter only on success

commit 86790e30 upstream.

Increment the reset counter only if soft recovery succeeded. This is
consistent with a ring hard reset behaviour where counter gets
incremented only if hard reset succeeded.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 25c314aa)
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>