common/qat: fix GEN3 marketing name

common/qat: fix GEN3 marketing name

This patch fixes the marketing name of the QAT GEN3 to P5xxx.
Updates this name mentioned in the compression PMD as well as
in the documentation.

Fixes: aa983f03ad2e ("crypto/qat: handle Single Pass Crypto Requests on GEN3")
Fixes: a124830a6f00 ("compress/qat: enable dynamic huffman encoding")
Fixes: 1f5e4053f9b4 ("common/qat: support GEN3 devices")
Cc: stable@dpdk.org
Signed-off-by: Adam Dybkowski <adamx.dybkowski@intel.com>
Acked-by: Fiona Trahe <fiona.trahe@intel.com>