pbrd:fix mismatching in match src-dst

pbrd:fix mismatching in match src-dst

upstream commit 67765a232d has incorect
address family check which prevent from
deleting src/dst config under pbr rule.

Ticket:#3405024
Issue:3405024
Testing Done:

Config:

pbr-map map6 seq 1
 match src-ip 2000::200:100:100:0/96
 match dst-ip 2000::100:100:100:0/96
 set nexthop-group group3

Before:
torc-12(config)# pbr-map map6 seq 1
torc-12(config-pbr-map)# no match src-ip 2000::200:100:100:0/96
Cannot mismatch families within match src/dst

After:
torc-12(config)# pbr-map map6 seq 1
torc-12(config-pbr-map)# no match src-ip 2000::200:100:100:0/96
torc-12(config-pbr-map)#

Signed-off-by: Chirag Shah <chirag@nvidia.com>
(cherry picked from commit 03494887eddaa255d9b6a217bfff60cc63cede42)