Revert "drm/amdgpu: install stub fence into potential unused fence pointers"

stable inclusion
from stable-v5.10.194
commit 79ea9eb723b7d38e427e734d97f0e62596ba1389
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I9399M

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=79ea9eb723b7d38e427e734d97f0e62596ba1389



--------------------------------

This reverts commit 04bd3a362d2f1788272776bd8b10e5a012e69b77 which is
commit 187916e6 upstream.

It is reported to cause lots of log spam, so it should be dropped for
now.

Reported-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/27d08b24-3581-4451-b8db-5df144784d6a@roeck-us.net


Reported-by: From: Chia-I Wu <olvaffe@gmail.com>
Link: https://lore.kernel.org/r/CAPaKu7RTgAMBLHbwtp4zgiBSDrTFtAj07k5qMzkuLQy2Zr+sZA@mail.gmail.com


Cc: Christian König <christian.koenig@amd.com>
Cc: Lang Yu <Lang.Yu@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: sanglipeng <sanglipeng1@jd.com>