papi: fix typo in repr
papi: fix typo in repr

Reported by Vratko's review.
(Thanks for the review)

Fixes: 14b0b4791c0b8c886e7b5c9ca667d060f0bada0b

Type: fix

Change-Id: I9c080c0c40060cc77977e76edae03d60eb393ce2
Signed-off-by: Paul Vinciguerra <b92f79aabe4c9c18085c7347110a52af0898a0ef@vinciconsulting.com>

vpp-dev/vpp,FDio/vpp,chrisy/vpp,vpp-dev/vpp,FDio/vpp,vpp-dev/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,chrisy/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,vpp-dev/vpp,FDio/vpp,chrisy/vpp,vpp-dev/vpp,chrisy/vpp,vpp-dev/vpp,FDio/vpp,vpp-dev/vpp,FDio/vpp