arm64: configs: tegra21: enable INET_DIAG_DESTROY

arm64: configs: tegra21: enable INET_DIAG_DESTROY

Issue: ConnectivityManagerTest cts test is failing
due to socket close time out error

Fix: Enable CONFIG_INET_DIAG_DESTROY to allow
privileged process to administratively close sockets

Bug 200316929

Change-Id: Ibeaf0ac7b4eeae64bafabd2f761627b7787e829d
Signed-off-by: Srinivas Ramachandran <srinivasra@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1563797
Reviewed-by: Manikanta Maddireddy <mmaddireddy@nvidia.com>
Tested-by: Manikanta Maddireddy <mmaddireddy@nvidia.com>
Reviewed-by: Om Prakash Singh <omp@nvidia.com>
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com>