doc: restructure QAT guide
doc: restructure QAT guide

Restructure QAT PMD instructions and add a device table to
minimise duplication for each device and make it easier to add devices.
Fix some device name typos and poor formatting.

Signed-off-by: Fiona Trahe <7ba562cc372916cd557d0be347608f8b4da4f746@intel.com>
Acked-by: John McNamara <af31595c36a4239b9676e9b3a777d3e2f15a6c4d@intel.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk