examples/l3fwd: move packet group function in common

This will make the packet grouping function common, so
that other examples can utilize as per need.

For each architecture sse/neon/altivec, port

examples/l3fwd: move packet group function in common

This will make the packet grouping function common, so
that other examples can utilize as per need.

For each architecture sse/neon/altivec, port group
headers will be created under examples/common/<arch>.

Signed-off-by: Rahul Bhansali <rbhansali@marvell.com>
Tested-by: Konstantin Ananyev <konstantin.v.ananyev@yandex.ru>
Acked-by: Konstantin Ananyev <konstantin.v.ananyev@yandex.ru>

show more ...