driver: net: dpaa2-eth: replace struct "gnet_stats_basic_packed" with "gnet_stats_basic_sync"

commit 304640d0(net: sched: Merge Qdisc::bstats and Qdisc::cpu_bstats data types)
has dropped the struct "gnet_stats_basic_packed", replaced with "gnet_stats_basic_sync".
Here adapt to this changes.

Signed-off-by: Xulin Sun <xulin.sun@windriver.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>