drm/amdgpu: Add sysfs up clean for gfx_v12_1

drm/amdgpu: Add sysfs up clean for gfx_v12_1

Add sysfs clean up for gfx_v12_1 during gfx fini sequence. This will
prevent following crash while reloading driver

2645.490824] R13: 000055d0cb186330 R14: 000055d0cb185ed0 R15: 000055d0cb188f40
[ 2645.490825]  </TASK>
[ 2645.490836] amdgpu 0000:02:00.0: amdgpu: failed to create xcp sysfs files
[ 2645.490937] amdgpu 0000:02:00.0: amdgpu: sw_init of IP block <gfx_v12_1> failed -17
[ 2645.491018] amdgpu 0000:02:00.0: amdgpu: amdgpu_device_ip_init failed
[ 2645.491098] amdgpu 0000:02:00.0: amdgpu: Fatal error during GPU init
[ 2645.491547] amdgpu 0000:02:00.0: amdgpu: amdgpu: finishing device.
[ 2648.549939] ------------[ cut here ]------------
[ 2648.549942] WARNING: CPU: 0 PID: 2459 at /tmp/amd.aIpOeG3c/amd/amdgpu/amdgpu_irq.c:

Signed-off-by: Asad Kamal <asad.kamal@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>