media: tegra: cam_dev: fix memory leak in virtual_device_add

media: tegra: cam_dev: fix memory leak in virtual_device_add

If chip already added, we have a leak of v_chip. This patch
free v_chip if camera_chip_add(v_chip) return error.

bug 200007998

Change-Id: I81af0e8bd9f96f4d3d07491476584f48a8b33c1f
Signed-off-by: Allen Yu <alleny@nvidia.com>
Reviewed-on: http://git-master/r/416223
GVS: Gerrit_Virtual_Submit
Reviewed-by: Kerwin Wan <kerwinw@nvidia.com>
Reviewed-by: Thomas Cherry <tcherry@nvidia.com>
Reviewed-on: http://git-master/r/416887
Reviewed-by: Mitch Luban <mluban@nvidia.com>
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>
Tested-by: Bharat Nihalani <bnihalani@nvidia.com>