drm/amdgpu: add codes to capture invalid hardware access when recovery
When recovery thread has begun GPU reset, there should be not other threads to access hardware, otherwise system randomly hang. v2 (chk): rewritten from scratch, use trylock and lockdep instead of hand wiring the logic. v3: add in_irq check v4: change to check in_task Signed-off-by: NDennis Li <Dennis.Li@amd.com> Signed-off-by: NChristian König <christian.koenig@amd.com> Reviewed-by: NChristian König <christian.koenig@amd.com> Reviewed-by: NHawking Zhang <Hawking.Zhang@amd.com> Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>
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