Bluetooth: SMP: Fail if remote and local public keys are identical

stable inclusion
from stable-5.10.40
commit d8d261c7cfb3a5dd921b4aeeb944718afc3f3961
bugzilla: 51882
CVE: NA

--------------------------------

commit 6d19628f upstream.

This fails the pairing procedure when both remote and local non-debug
public keys are identical.

Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Chen Jun <chenjun102@huawei.com>
Acked-by: Weilong Chen <chenweilong@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>