net/dpaa2: remove loop for unused pool entries

net/dpaa2: remove loop for unused pool entries

Currently only one buffer pool is configured and in use,
looping for up to maxmum 8 times is unnecessary and might
be buggy as assigned uninititalized values.

The fix is to loop for the configured times with initialize
with valid values.

Fixes: 16bbc98a3e ("bus/fslmc: update MC to 10.3.x")
Cc: stable@dpdk.org
Signed-off-by: Gavin Hu <gavin.hu@arm.com>
Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>
Acked-by: Shreyansh Jain <shreyansh.jain@nxp.com>