octeon: remove unused variable

The variable 'i' was incremented but never used, triggering
unused-but-set-variable when building with -Werror.

Type: fix

Jira: https://essjira.marvell.com/browse/IPBUSW-60244

Signed-off-by: Nagendra T P <ntp@marvell.com>
Change-Id: I6771e543f77161ccf3af0a1ad02d27cb595eb8ab
Reviewed-on: https://sj1git1.cavium.com/c/IP/SW/toolkits/vpp/+/146259
Tested-by: sa_ip-sw-jenkins <sa_ip-sw-jenkins@marvell.com>
Reviewed-by: Monendra Singh Kushwaha <kmonendra@marvell.com>
(cherry picked from commit 345f310ad6a8d681583ab885c699f6bf5e490432)

src/plugins/dev_octeon/virtio.c

@@ -208,7 +208,6 @@ oct_populate_dma_device_list (u16 *nb_elem, u8 *dma_list)
 static void
 oct_virtio_parse_arguments (dao_pal_global_conf_t *conf, vnet_dev_arg_t *args)
 {
-  int i = 0;
   vnet_dev_arg_t *a = args;
 
   for (; a < vec_end (args) && a->val_set; a++)
@@ -233,7 +232,6 @@ oct_virtio_parse_arguments (dao_pal_global_conf_t *conf, vnet_dev_arg_t *args)
 	  log_info ("Invalid virtio device arguments received\n");
 	}
 
-      i++;
     }
 }