net/cnxk: fix out of bounds accesses

net/cnxk: fix out of bounds accesses

Fix out of bounds access in cmd array which was reported in coverity
scan.

Coverity issue: 375245, 375246, 375260, 375263, 375264, 375271
Coverity issue: 375278, 375279, 375273, 375274, 375275, 375276
Coverity issue: 375280, 375281, 375283, 375286
Fixes: c5b97e98837 ("net/cnxk: add cn10k template Tx functions to build")
Fixes: dd8c20eee47 ("net/cnxk: add cn9k template Tx functions to build")
Cc: stable@dpdk.org
Signed-off-by: Gowrishankar Muthukrishnan <gmuthukrishn@marvell.com>
Acked-by: Jerin Jacob <jerinj@marvell.com>