octeontx2-af: devlink: fix NIX RAS reporter to use RAS interrupt status

octeontx2-af: devlink: fix NIX RAS reporter to use RAS interrupt status

The NIX RAS health report path uses nix_af_rvu_err when handling the
NIX_AF_RVU_RAS case, so the report prints the ERR interrupt status rather
than the RAS interrupt status.

Use nix_af_rvu_ras for the NIX_AF_RVU_RAS report.

Fixes: 5ed66306eab6 ("octeontx2-af: Add devlink health reporters for NIX")
Signed-off-by: Alok Tiwari <alok.a.tiwari@oracle.com>
Link: https://patch.msgid.link/20260310184824.1183651-2-alok.a.tiwari@oracle.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>