net: bcmgenet: switch to use 64bit statistics

Update the driver to use ndo_get_stats64, rtnl_link_stats64 and
u64_stats_t counters for statistics.

Signed-off-by: Zak Kemble <[email protected]>
Tested-by: Florian Fainelli <[email protected]>
Reviewed-by: Florian Fainelli <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

Author: ZakKemble