net/ice/base: fix signed package download

net/ice/base: fix signed package download

In order to properly support signed packages, we always have
to send the complete buffer to firmware, regardless of any
unused space at the end. This is because the SHA hash value
is computed over the entire buffer.

Fixes: 51d04e4933e3 ("net/ice/base: add flexible pipeline module")
Cc: stable@dpdk.org
Signed-off-by: Dan Nowlin <dan.nowlin@intel.com>
Signed-off-by: Paul M Stillwell Jr <paul.m.stillwell.jr@intel.com>
Signed-off-by: Leyi Rong <leyi.rong@intel.com>
Acked-by: Qi Zhang <qi.z.zhang@intel.com>