octeontx2-af: npc: Use common structures

octeontx2-af: npc: Use common structures

CN20K and legacy silicon differ in the size of key words used
in NPC MCAM. However, SoC-specific structures are not required
for low-level functions. Remove the SoC-specific structures
and rename the macros to improve readability.

Signed-off-by: Ratheesh Kannoth <rkannoth@marvell.com>
Link: https://patch.msgid.link/20260224080009.4147301-14-rkannoth@marvell.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>