Revert "net: add atomic_long_t to net_device_stats fields"

This reverts commit 2b601fca which is
commit 6c1c5097781f563b70a81683ea6fdac21637573b upstream.

It breaks the CRC checking for the Android KABI (doesn't really break
any actual ABI, but it isn't nice.)  As this isn't needed for Android
systems at this point in time, just revert it to keep the CRC abi
stable.

If it is needed to come back, it can be reworked to be a CRC-abi neutral
change if so desired.

Bug: 161946584
Fixes: 2b601fca ("net: add atomic_long_t to net_device_stats fields")
Cc: Eric Dumazet <edumazet@google.com>
Change-Id: I9d3d9fb55ab5482a4ea92fcc4a2fb70c4471edec
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>