octeontx2-af: Fix interrupt name strings

Fixed interrupt name string logic which currently results
in wrong memory location being accessed while dumping
/proc/interrupts.

Fixes: 48260907 ("octeontx2-af: Enable CPT HW interrupts")
Signed-off-by: Sunil Goutham <sgoutham@marvell.com>
Signed-off-by: Subbaraya Sundeep <sbhatta@marvell.com>
Link: https://lore.kernel.org/r/1641538505-28367-1-git-send-email-sbhatta@marvell.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>