drm/amdgpu: Revert 'drm/amdgpu: annotate a false positive recursive locking'

Since we have a single instance of reset semaphore which we
lock only once even for XGMI hive we don't need the nested
locking hint anymore.

Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Link: https://www.spinics.net/lists/amd-gfx/msg74120.html