drm/amdgpu: csa unmap use uninterruptible lock

In the Linux kernel, the following vulnerability has been resolved:

drm/amdgpu: csa unmap use uninterruptible lock

After process exit to unmap csa and free GPU vm, if signal is accepted

and then waiting to take vm lock is interrupted and return, it causes

memory leaking and below warning backtrace.

Change to use uninterruptible wait lock fix the issue.

WARNING: CPU: 69 PID: 167800 at amd/amdgpu/amdgpu_kms.c:1525

amdgpu_driver_postclose_kms+0x294/0x2a0 [amdgpu]

Call Trace:

<TASK>

drm_file_free.part.0+0x1da/0x230 [drm]

drm_close_helper.isra.0+0x65/0x70 [drm]

drm_release+0x6a/0x120 [drm]

amdgpu_drm_release+0x51/0x60 [amdgpu]

__fput+0x9f/0x280

____fput+0xe/0x20

task_work_run+0x67/0xa0

do_exit+0x217/0x3c0

do_group_exit+0x3b/0xb0

get_signal+0x14a/0x8d0

arch_do_signal_or_restart+0xde/0x100

exit_to_user_mode_loop+0xc1/0x1a0

exit_to_user_mode_prepare+0xf4/0x100

syscall_exit_to_user_mode+0x17/0x40

do_syscall_64+0x69/0xc0

(cherry picked from commit 7dbbfb3c171a6f63b01165958629c9c26abf38ab)