Remove intel_gpgpu_check_binded_buf_address()

Remove intel_gpgpu_check_binded_buf_address()

On recent kernel with full PPGTT support, we can possibly bind buffer
offset with 0, but intel_gpgpu_check_binded_buf_address() always thinks
it's invalid, which is not true. So simply remove the check.

v2: Add comment on why this was added and leads to failure. Use FIXME tag
on issue that needs to be fixed otherwise.

Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Reviewed-by: Zhigang Gong <zhigang.gong@linux.intel.com>