NTB: fix possible name leak in ntb_register_device()

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: NTB: fix possible name leak in ntb_register_device() If device_register() fails in ntb_register_device(), the device name allocated by dev_set_name() should be freed. As per the comment in device_register(), callers should use put_device() to give up the reference in the error path. So fix this by calling put_device() in the error path so that the name can be freed in kobject_cleanup(). As a result of this, put_device() in the error path of ntb_register_device() is removed and the actual error is returned. [mani: reworded commit message]

References

• https://git.kernel.org/stable/c/a62b9f3d7bbfac874cc0c638bc1776dcf1f8ec06
• https://git.kernel.org/stable/c/6632a54ac8057cc0b0d789c6f73883e871bcd25c
• https://git.kernel.org/stable/c/a039690d323221eb5865f1f31db3ec264e7a14b6
• https://git.kernel.org/stable/c/e8025439ef8e16029dc313d78a351ef192469b7b
• https://git.kernel.org/stable/c/913421f9f7fd8324dcc41753d0f28b52e177ef04
• https://git.kernel.org/stable/c/aebfdfe39b9327a3077d0df8db3beb3160c9bdd0