utils: use strtol instead of atoi

HEX format is friendly to iSCSI utils, for example:
./iscsi-inq -e 0x1 -c 0xb1 iscsi://...

atoi supports decimal only, this example does not work.
Use strtol(nptr, NULL, 0) to auto-detect format, then this works fine.

Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>

utils/iscsi-pr.c

@@ -338,7 +338,7 @@ int main(int argc, char *argv[])
                                 break;
 
                         case 'T':
-                                type = atoi(optarg);
+                                type = strtol(optarg, NULL, 0);
                                 break;
 
                         case 'G':